Tính

a ,   3 3 + 7 9 : 1 5 b ,   3 : x = 4 5

Choose the word or phrase that is CLOSEST in meaning to the underlined part in the following questions. Coming on top of the previous years of extreme scarcity of food, however, the longer term economic implications were profound.

A. Drought

B. Famine

C. Flood

D. earthquake