Identify the problem with pronoun reference as ambiguous, remote, or broad. we decided to enjoy a walk to the park after eating supper. this became a regular habit. reference since the car drips oil on the driveway, put a piece of cardboard under it. reference

in the first sentence, the problem is broad pronoun reference.   broad reference occurs when a pronoun is used to take the place of a complete clause or sentence rather than a noun or noun phrase.   in this case, "this" refers back to "to enjoy a walk to the park after eating supper".

in the second sentence, the problem is remote pronoun reference.   remote pronoun reference takes place when a pronoun is so far from its antecedent that the relationship between them is unclear. "it" refers back to the np "the car" which is at the beginning of the sentence.

i think that will have something to do with the mississippi river but google will know the full answer for sure

d is the best answer for this question.