Times of extreme cold when great sheets of ice covered parts of the earth were the a) ice ages b)bronze age c)stone age d)golden ages

Ice ages

Explanation:

All the other answers refer to other times in history and do not make sense to the question

the answer is a) the proclamation of 1763.

richard milhous nixon (january 9, 1913 – april 22, 1994) was the 37th president of the united states, serving from 1969 to 1974, when he became the only president to resign (quit). he is also known for corruption and the watergate scandal which resulted in the public losing trust in him and his resignation.