In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.
A brain and nervous system that are poorly developed or insufficiently nourished means low grade of _______ in our mental processes, just as a poorly constructed or wrongly adjusted motor means loss of power in applying the electric current to its work. We will look upon the mind and the brain as counterparts of_______other, each performing activities which correspond to is concerned, and each getting its_________by its union with the other. This view will lend interest to a brief study of the brain and nervous system.
each getting its ........... by its union with

Options

A. significant
B. significance
C. significantly
D. significances

Answer

B