What will be correct option for `61`
Man's basic aggressiveness is a fact and is the emotional factor for all the bloody violence that has marked human history since the beginning. His technology has never been as perfect- ly 61 as in the weapons he makes to 62 his brothers. The plough has changed very 63 in design from the time man took 64 cultivation. But swords have not become 65 and the rifle, with which one man kills another, is a 66 in comparison with the stone and 67 with which he used to 68 his adversartes in the earliest stage of civilisation. Nuclear 69 has designs that nature can never 70. They are won- ders of technological creation.

Options

A. 1.operated
B. implemented
C. 3.employed
D. 4.deployed

Answer

B

Explanation

implemented (Verb)