Fill in the blank with the most appropriate word.
The population of Moscow has increased rapidly. As a result there is a housing shortage.
As a result of the population of Moscow _____ rapidly, there is a housing shortage.
A verb is used to express an occurrence, action , or state. It is the grammatical centre of the predicate in a sentence.
Option C is the correct as the action of increase in Moscow's population has led to a housing shortage and tells us that the population has already increased (the action is already completed ).
The other options are incorrect as the action is not in a continuation, in the long gone past, and the two different sentences are joined together by the clause of reason (as).
The correct option is C)having increased.
The correct option is A)