Which is the best way to write sentences 11 and 12?

(11) The swimmers think they are a pain to put on. (12)
The swimmers do like how the suits help them, though.

A. Although the swimmers think the suits are a pain to put on, they like how the suits help them.

B. The swimmers think that the suits are a pain to put on and they do like how they help them, though.

C. Leave as is.

D. The swimmers do like how the suits help them, though, and the swimmers think they are a pain to put on.