Which One of the Following Sentences Has a Problem with Parallelism

Which one of the following sentences has a problem with parallelism?

A) Today's news reported on the weather, the stock exchange, and the campaign.
B) Don't run around the pool, eat in the pool, or swim during a storm.
C) We went to the beach to relax, swim, and are planning to eat out a lot.
D) Reading, writing, and arithmetic make up the main curriculum.