Select the properly punctuated sentence. mike and maria's political beliefs don't always match exactly with their two sisters' opinions. mike's and maria's political beliefs don't always match exactly with their two sister's opinions. mike's and maria's political beliefs don't always match exactly with their two sisters' opinions. mike and maria's political beliefs don't always match exactly with their two sister's opinions.

The correct answer is A. Mike and Maria's political beliefs don't always match exactly with their two sisters' opinions

Explanation:

In English, the apostrophe (')  is commonly used to express ownership or possession. According to grammar, the apostrophe followed by an"s" is added to the noun that acts as the owner, except if the noun ends in "s", in this case, it is not necessary to add an "s", but only the apostrophe. On the other hand, if there is more than one noun that acts and owner the apostrophe and "s" should be added individually if the ownership is equally individual or only in the last noun if the ownership is shared.

Considering this, in the sentence presented in the apostrophe should be added in Maria as "Mike and Maria's" considering the political beliefs of both of them  (Maria and Mike) are the same, which means the ownership is shared and in the case of "sisters" the apostrophe should be added, but not the "s". Therefore, the correct sentence is "Mike and Maria's political beliefs don't always match exactly with their two sisters' opinions".

- "a nonrestrictive clause functions as a modifier to a noun (that is an object, person or concept). these clauses can be described by the following three options: it is set off by comas, it contains a subject and a verbs and it adds nonessential information to the sentence.

for example, in "here is bill gates, who confounded microsoft software company" we can identify "who confounded microsoft software company" as a nonrestrictive clause modifying the noun bill gates. this clause can be describes as a nonrestrictive clause because it is separated by a comma, it adds nonessential information to identify who bill gates is and it must contain both a subject (who) and a verb (confounded)."