Final answer:
The sentence in question is a b) compound sentence because it consists of two independent clauses connected by the conjunction 'but'.
Step-by-step explanation:
The sentence "I enjoyed the play, but I didn't like the end" is a compound sentence. A compound sentence is made up of two or more independent clauses (complete sentences) that are connected by coordinating conjunctions such as 'and,' 'but,' 'or,' 'so,' 'yet,' and 'for.'
In this case, 'I enjoyed the play' and 'I didn't like the end' could both stand as sentences on their own, but they are connected with the conjunction 'but' to express a contrast between the speaker's feelings about different aspects of the play.