The defense attorneys wanted to interview the jurors following the gui

using 'them' wont be right - as we are not sure who them is being referred to? The jurors or the attorneys?
Using this, we can eliminate choice (A) and (C)

Keep in mind that the word prohibited is used - you prohibit someone from doing something, not 'to'. Hence answer choice (E) can be eliminated.

Now, we are left with answer choice (B) and (D).

We know that - defense attorneys wanted to interview the jurors following the guilty verdict, which is the past tense.

Hence, choice (D) should be the answer.

KAPLAN OFFICIAL EXPLANATION

(D)

Step 1: Read the Original Sentence Carefully, Looking for Errors

The underlined portion of the sentence begins with a pronoun (“them”). A quick glance at the choices reveals that three of them replace this pronoun with a noun, prompting a check for ambiguous pronoun usage. The use of “them” in the original sentence is ambiguous, because you don’t know whether the judge’s order prohibited the attorneys or the jurors from discussing the case after the trial.

Step 2: Scan and Group the Answer Choices

(A) and (C) retain the ambiguous pronoun “them,” while (B), (D), and (E) replace it with “the jurors.”

Step 3: Eliminate Choices Until Only One Remains

Because (A) and (C) retain the pronoun error, they can be eliminated. Of the remaining choices, (B) changes the the verb phrase at the end to a present tense form (“is concluded”), whereas (D) and (E) keep the original past tense phrasing (“had concluded”). Because the rest of the sentence is in past tense, it does not make sense in the context of the sentence to switch to present tense for this verb, so (B) can be eliminated as well.

The only difference between the remaining choices is that (D) retains the original language “from discussing,” while (E) changes it to “to discuss.” This is an idiom issue, and the right phrasing will depend on the verb that the phrase follows. In this case, the original sentence uses “prohibited,” which takes the preposition “from” rather than “to.” Eliminate (E) and read (D) back into the sentence to confirm:

The defense attorneys wanted to interview the jurors following the guilty verdict, but a gag order issued by the judge prohibited the jurors from discussing the trial even after it had concluded.