Question

Choose the sentence that is correctly punctuated.

Answer 1

Answer:

This article argues that there are some interesting similarities between​ Lincoln's and​ Kennedy's assassinations.

Explanation:

What is needed for both names—Lincoln and Kennedy—are apostrophe followed by an “s.”  There needs to be this for both names because they each had separate assassinations.  Note the following examples:

Mom and Dad’s car = Mom and Dad share the same car

Mom’s and Dad’s car = Mom and Dad each have their own car  

Answer 2

The sentence that is correctly puntuated is "This article argues that there are some interesting similarities between​ Lincoln's and​ Kennedy's assassinations. " Option A is correct.

The possessive 's shows that something belongs to someone or something.

According to the rule, we use ’s after a singular noun and ’ after a plural noun.  In this case, both names Lincoln and Kennedy do not end in S, so, in order to show that something belongs to them, we have to add 's.