Sentence 3 is a. sentence 3: playing beach volleyball, and lying on the beach.
a. sentence fragment
b. command sentence.
c. complete thought.
d. run-on sentence.

a

Explanation:

This is a fragment because it lacks a subject and a verb. Having a subject and a verb is what a makes a sentence (independent clause) different from a dependent clause.

Dependent clauses, of which a fragment is an example, express ideas, but they do not express them coherently and are often incomplete.

A command sentence is one that gives an order, and a complete thought would be something like:

We enjoy playing beach volleyball and lying on the beach.

what are the following?

i think   they were arguing over whether they would get info from doing it or nit was invading privacy