Question

What is the correct possessive form of bridges? bridges bridges’ bridges’s bridge’s

Answer 1

It is "bridge's". 
"bridges" is just multiple of them
"bridges' " is possessive in the case of more than one bridge 
and "bridges's" is not a word

Answer 2

Answer: B) Bridges'

Explanation: A noun names a person, place, thing, idea, quality or action. A possessive noun shows ownership by adding an apostrophe, an "s" or both. If the noun is singular, we should add and apostrophe and the letter "s" at the end of the word (for example, possessive of "bridge" is "bridge's"). If the noun is plural, we just have to add an apostrophe at the end of the word (for example: the possesive of "bridges" is "bridges'"). So the correct answer is option B.