In the following passage some of the words have been left out. Read the passage carefully and select the correctn answer for the given blank out of the four alternatives.
Science is both a _______ blessing and a While it has given us many things which have made life better and _____ it has also given terrible instruments of has discovered and invented many things to _______ pain and cure terrible diseases. These discoveries have enabled man to live a longer and ______ life.
discovered and invented many things to______.

Options

A. aggravate
B. alleviate
C. nurture
D. intensity