The dog was too old to play roughly with the __ too old to enjoy running around the neighborhood. A. kids, it was not
B. kids; it was not

A) kids, it was not

Explanation:

; can be used to separate parts of a sentence which need clearer separation than would be shown by a comma, to separate main clauses which have no conjunction between, and to separate phrases and clauses containing commas

, is used to keep distinct information separated. It helps the reader understand how the ideas in the sentence work together. Although many writers benefit from reading aloud commas as pauses while proofreading, a comma does not always represent a pause in a spoken sentence.

they insisted that there was not enough time to learn everything.  

explanation:

if they were going to steal the answers that is simply because they insisted that there was not enough time to learn everything.  

last one is the answer