Hello. You did not submit the text to which this question refers, which makes it impossible for this question to be answered. However, I will try to help you as best I can.
A textual evidence is a statement that proves an argument or information presented by the author of a text. This statement explains why the information in the text is correct, how events presented in the text happened and even confirm facts and justify ideas presented in the text. In this case, to answer your question, you will have to read all the text that is related to it and identify the sentences that try to explain and show how the territorial expansion in 1840 happened. This evidence can be considered good and effective, if it presents historically proven justifications for territorial expansion, going so far as to prove to the reader that this expansion, in fact, happened, and presenting the reasons that established it.
Shi'a Islam or Shi`ism (from the Arabic word شيعة, Persian: شیعه) is the second largest school within Islam. Shi'a Muslims adhere to the teachings of the Islamic prophet Muhammad and his Ahlul Bayt (family). Shi'as believe that the Imam – their preferred title for the political and religious leader of the Muslim community must belong to the direct lineage of Muhammad through his daughter Fatima and her husband (and Muhammad's cousin), Ali ibn Abi Talib (Imam Ali, the fourth caliph). The Imam is regarded as sinless and infallible and appoints his successor (except within the Zaydi sub-group, in which he emerges). The Shi'as reject the first three caliphs in Sunni Islam as usurpers of Ali's Imamate. The theme of lineage and infallibility of the Imam developed within Shi'a Islam, as well as the idea of a hidden Imam who will bring God's judgment in the Last Days. There are several sub-divisions. Some Shi’a, such as the Aga Khan Ismailis recognize a living Imam. For the majority group, the Imam is now "hidden" but will return as the Mahdi. Relations between 'Shi'a and Sunni Muslims have been strained although efforts at reconciliation have also been made. The differences between the two schools can be maximized or minimized, depending on the agenda of the commentator. Shi'a have often lived as minorities and as such have experienced persecution. Since the beginning of the Safavid Dynasty it has been the State religion in Iran, where this status has often led to confusion between religion and the pursuit of Iranian national goals, which have sometimes involved a desire to restore Persia's ancient power and prestige in the region.
<h3>Etymology</h3>
The term Shi'a comes from the Arabic word شيعة Shi'a. The singular/adjective form of this name is Arabic shi`i شيعي.
"Shi'a" is the short form of the historic phrase shi`at `Ali شيعة علي, meaning "the advocates of Ali." Sunni and Shi'a sources trace the term to Muhammad himself. The phrase Shi'a of Ali was historically a title given by Muhammad and later by his descendants in praise of Ali's followers and that of the Ahlul Bayt (house of the Prophet’s family). Rippin (1991) refers to Shi'a as an "alternative vision of Islamic identity" (Rippin 1991, 103-116).
