Which is a complete sentence?

ARoosevelt Arch, the first major entrance.
BYellowstone Park sits on a dormant volcano.
CTo capture breathtaking views.
DA less traveled route to Lone Star Geyser.

Verified Answer :

BYellowstone Park sits on a dormant volcano.

It is a complete sentence because it has a subject, a verb, and it expresses a complete thought.

Its subject is Yellowstone Park. Its verb is sits. It expresses a complete thought, meaning it does not give rise to questions.

choice a - only has a subject
choice c - dependent clause, gives rise to the question "why?" like why are we here? answer: we are here to capture breathtaking views.
choice d - dependent clause. gives rise to the question "what?". like what is a less traveled route to Lone Star Geyser? answer: Blank bridge is a less traveled route to Lone Star Geyser.