There are far fewer children available for adoption than there are peo

There are far fewer children available for adoption than there are people who
want to adopt. Two million couples are currently waiting to adopt, but in 1982,
the last year for which figures exist, there were only some 50,000 adoptions.
Which of the following statements, if true, most strengthens the author’s claim
that there are far fewer children available for adoption than there are people who
want to adopt?
(A) The number of couples waiting to adopt has increased significantly in the last
decade.
(B) The number of adoptions in the current year is greater than the number of
adoptions in any preceding year.
(C) The number of adoptions in a year is approximately equal to the number of
children available for adoption in that period.
(D) People who seek to adopt children often go through a long process of
interviews and investigation by adoption agencies.
(E) People who seek to adopt children generally make very good parents.

Would go with C....

C strengths the no of adoption with the available children..... this gives the statement in the stem - "but in 1982, the last year for which figures exist, there were only some 50,000 adoptions." clear significance that no of children are few....!