B. The water was cold, but we went swimming anyway
Explanation:
The words "and" and "but" are the mkst common coordinating conjunctions, that being said, another thing you would need to know is that a coordinating conjunction is placed between words, an example is “I rode the bus, and arrived at my mother's house.”
THe answer is A. Themselves. A reflexive pronoun indicates that the person who is realizing the action of the verb is also the recipient of the action.
