Which is a complete sentence?

A.

Four baby ducks waddling down the path.

B.

Walked the dog early Friday morning.

C.

The funniest part of the comedy show.

D.

He wants to arrive on time.

Option D. He wants to arrive on time.

It is the only option that has subject and predicate.

What happens with the other options.

A) There is no predicate, so you do not know what happen with the Four baby dogs wadding down the path.

B) There is no subject. Who walked the dog?

C) The funniest part of the comedy show ... clearly is also incomplete, you do not know even if this is a subject or a predicate, depends on what you wanted to say.

I believe it is D, correct me if I'm wrong but I'm pretty sure that's right