True. If I do remeber correctly, indigo is a spice used in coffee and tea. hope this helps:)
c. He wanted to prevent the spread of communism to other countries.
Explanation:
Europe in the nineteenth century drew on immense new resources created by the Industrial Revolution to underpin its expansion.
• European states were more powerful in the nineteenth century and were able to field more military resources in their imperialist competition with each other.
• To a greater extent than before, in the nineteenth century Europe enmeshed other parts of the world in networks of trade, investment, and sometimes migration. This ultimately generated a new world economy.
• Unlike the early modern period, in the nineteenth century European expansion brought with it a new culture of modernity—its scientific rationalism and technological achievements, its belief in a better future, and its ideas of nationalism, socialism, feminism, and individualism
Cross-checking information is important since it is one of the main methodological sources of validating knowledge in areas such as History, Law and Social sciences. Cross-checking is to History just as the scientific method to Physics. The claims and authenticity for example of some documents are validated through the use of this procedure.
The results of cross-checking information also occur in some settings where field research is carried. It can be used when engaging in anthropological or sociological research. An example of it is seen when interviews are carried in mental health institutions, to patients, to doctors, families, and surveys also are checked against people that are related to the object of study. These are corroborated with people who can help or provide unbiased knowledge on the inquiries. See below ... :)