Here are three possible sentences. They are intended to convey compound possession—each user has his or her own separate account which has its own separate logs.
- I reviewed Mr. Smith's and Ms. Doe's account logs.
- I reviewed Mr. Smith's and Ms. Doe's accounts logs.
- I reviewed Mr. Smith's and Ms. Doe's accounts' logs.
My reasoning for each option (right or wrong) is as follows:
- In #1, I believe that 'account' functions as an adjective modifying the type of logs.
- In #2, I think that since there are two distinct accounts, the word should be plural (but am unclear on its relationship to 'logs').
- In #3, each account possesses its own logs.
I know it is clearer to rewrite it to something such as:
I reviewed the logs for Mr. Smith's and Ms. Doe's accounts.
Even so, which of the above three are correct (if any)? Why?