Question

What is/are the object(s) of the following sentence?: They are pushing the apple cart.

Answer 1

cart

Explanation:

it is a direct object here and apple is acting like an adjective here.

Don't be misguided about D. O. and I. O.

Accordingly by Cliffs for TOEFL, preparation, D.O. is animated/ non animated anything.
I.O. is only animated things, don't be understood by passive form definition of others.