What does the underlined conjunction connect in the sentence?

grandfather ate two slices of pizza and drank two glasses of iced tea.

a.
predicates

b.
direct objects

c.
sentences

d.
subjects

Well, it can't be object a. because the sentence is not predicting if "grandpa" is going to do that action because it is past-tense meaning grandpa has already done it. I think it is direct object because grandpa ate the two slices of pizza and drank two glasses of iced tea.

Ithink that the answer is a