Answer:
Option C : f+23 is the correct answer.
Explanation:
Given that:
Amount Dominic wants everyone to contribute = $2
Number of relatives who have contributed = 23
The expression is;
2(f+23)
As we know that 2 represents the amount and 23 represents the number of relatives who have donated, therefore,
f represents the number of people who would donate to the library fund, and
f+23 represents the total number of people who contributes to the fund.
Hence,
Option C : f+23 is the correct answer.