In the following passage some words have been deleted. Fill in the blanks with the help of the alternatives given. Select the most appropriate option for each number. Passage:
Settlements are (1)............. where people build their homes. (2)............. human beings lived on trees and (3)............. caves. When theystarted (4)........... crops it became (5)......... to have a permanent home.
Select the most appropriate option that will fill in the blank number 5.

Options

A. needed
B. required
C. necessary
D. requirement

Answer

C