This sentence is a simple sentence. The answer would be "Simple".
A compound sentence would look like this:
"Annabelle raced to the toy store and she begged her mother to buy a toy at the store.
A complex sentence would look like this:
"If you touch the hot stove, you will get burned."
A compound-complex sentence would look like this:
"While I ran to library, Keith strolled leisurely behind me, and he enjoyed his ice cream cone whereas I tried to gobble mine down."
I hope this helps you.
