Select the letter that identifies the type of noun that is in

parentheses in the following sentence:
However, there are fewer professional sports (opportunities) for women
than for men.
a. proper
b. concrete
c. collective
d. abstract
e. possessive form

d. abstract

The type of noun that is in parentheses in the sentence is an (opportunity). This noun is an example of a(n):

- d. abstract noun