What,if anything,is wrong with this sentence?

An appeals court ordered the money
returned,however,the IRS didn't comply.

A. PROPERLY CONSTRUCTED SENTENCE
B. LACKS PARALLEL PARTS
C. DANGLER
D. COMMA SPLICE

I THINK THE CORRECT ANSWER IS:
(B)LACKS PARALLEL PARTS

AM I CORRECT?

No. See the following:

http://grammar.ccc.commnet.edu/grammar/runons.htm

http://grammar.ccc.commnet.edu/grammar/clauses.htm
Scroll to the section on Independent Clauses.

http://grammar.ccc.commnet.edu/grammar/marks/semicolon.htm

Let me know what you think.

=)

comma splice

You are correct. The sentence in question is a comma splice. A comma splice occurs when two independent clauses are joined together with only a comma, which is grammatically incorrect. In this sentence, "An appeals court ordered the money returned" and "the IRS didn't comply" are both independent clauses. To correct this sentence, you can either separate the clauses into two sentences or use a coordinating conjunction (such as "but") to join them.