The cause is if you finish your yard work.
<em><u>Answer:</u></em>
b) The comma attempts to join two independent clauses.
<em><u>Explanation:</u></em>
When two ideas come together and either one of them can stand by itself as its own, independent sentence, then the use of the comma is correct:
Comma + a conjunction (and, but, for, nor, yet, or, so)
The tomcats and the Huskies were the two teams that battled for the city championship
Nick became involved with Jordan because of his relationship with Daisy and Tom. He broke the relationship off because he was sick of her immaturity and how she lied all of the time. He said she was on of the most dishonest and careless people he has ever known.