A direct object is the part of the sentence that is somehow manipulated by the subject, and the type of the manipulation is described by the verb.
here the subject is "The delighted children" and the verb is "picked"
the direct object is "pumkins" - the correct answer is d.
The answer is distinctly. Sharon spoke distinctly to the policeman after the accident, giving him clearly understood information about what had happened.
(it could also be clearly, but i didn't want to repeat it since theres already a "clearly" in the sentence.)
The answer is most likely the second one