Which group of words in the sentence is a prepositional phrase?

there were three small snapping turtles lying still on the rocks.

a.
there were

b.
lying still

c.
three small snapping turtles

d.
on the rocks

Select the choice which features correct pronoun-antecedent agreement. es a) both of the boys had his shoes on. b) both of the boys had its shoes on. 9) neither of the boys had his shoes on. d) neither of the boys had their shoes on.