B or 2. officers'
I believe that plural possessive nouns are nouns that are plural, (officers) and possessive (belonging to officers), and the rule is if the word ends with s you put an apostrophe at the end of the word. I Hope that potentially helps, but you should compare my answer with the other person answering.
is the plural possessive form
The plural form of man is men so the noun is men. The plural possessive form of men is men's
pretty sure it's d, answer a isn't proper grammer or a word... but that's controversial
Sailors lives were difficult many years ago
the second option has the correct plural possessive for the sentence.
putting the apostrophe after the s indicates multiple sailors, making it correctly match the rest of the sentence.