Choose the sentence that is correctly punctuated.
a.
this article argues that there are some interesting similarities between lincoln's and kennedy's assassinations.
b.
this article argues that there are some interesting similarities between lincolns and kennedys assassinations.
c.
this article argues that there are some interesting similarities between lincoln and kennedy's assassinations.
d.
this article argues that there are some interesting similarities between lincolns' and kennedys' assassinations.

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  

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.

i think it is called the president's cabinet.

no, i never do because that’s not the reason for what i speak to or of.