Answer:group A
Expination its quite obvious because in the first every thing became steam powered and then but then in the second one electricity and petroleum became main power sources as they were more effeciant
The National Solar Observatory is a public research entity whose mission is to engage in the development of the knowledge of the Sun.
The institution is currently evoked to the construction of the Daniel K Inouye Solar Telescope, which is located on the island of Maui, in the State of Hawaii. The project started in January 2013.
The initial phase of the construction involved the civil works. Specifically the telescope housing, which was completed in September 2013.
The second phase involves the actual installation of the telescope. The first mirror, which has a thickness of 75 mm and a diameter of 12 meters was delivered to the site on August 2, 2017. The process is expected to conclude by early 2019, with the reception and further installation of the second mirror.
By the end of the 19th century, reform efforts resulted in a constitutional amendment to allow women the right to vote.
Hitler<span> broke the Treaty of Versailles by moving troops into the Rhineland demilitarised zone.</span>
