Answer:
The correct possessive form in this sentence is:
"Before 2014, the United States Congress's health insurance system offered good benefits for representatives and senators."
Step-by-step explanation:
The rules for forming possessives are:
- For singular nouns ending in s, add an apostrophe s ('s)
- For plural nouns ending in s, add only an apostrophe (')
- For plural nouns not ending in s, add an apostrophe s ('s)
In this case:
- "Congress" is a singular noun ending in s
- So to form the possessive, we add an apostrophe s ('s)
- Giving us "Congress's"
The other options are incorrect:
- "representatives' and senators'" - Uses apostrophe (') for plural noun "representatives" ending in s. But we need apostrophe s ('s) for the singular noun "Congress".
- "representatives’s and senators’s" - Uses apostrophe s ('s) for the plural nouns "representatives" and "senators". But only the singular noun "Congress" needs the apostrophe s for the possessive form.
So "Congress's" is the correct possessive form in this sentence. Let me know if this explanation makes sense!