Fill in the blank with the most appropriate option: Rarely _____ such an overwhelming consensus among critics.

Correct — A. The trigger is Rarely at the front of the clause. A negative adverb in that position brings inversion: the auxiliary comes before the subject, as in a question.

Here the subject slot is filled by there, so the order is auxiliary + there + been:
Rarely has there been such an overwhelming consensus among critics → option (a).

The verb is singular has because the noun it agrees with, consensus, is singular.

Why the others are wrong

• (b)
  there has been — There has been keeps normal statement order. After a fronted Rarely the auxiliary must come first: Rarely has there been, not Rarely there has been.
• (c)
  was there — Was there is correctly inverted, but it places the sentence in a finished past period the sentence never names. With no past time given, the present perfect has there been fits.
• (d)
  had been — Had been leaves out there, so nothing fills the subject slot after the auxiliary. The past perfect would also need a past reference point that the sentence never gives.

Negative inversion: when a clause opens with a negative or restrictive word such as never, rarely, seldom, hardly, scarcely or little, the first auxiliary moves in front of the subject.

Normal order: There has rarely been such a consensus.
Fronted: Rarely has there been such a consensus.

In a there-sentence, there takes the subject position for the inversion, and the verb agrees with the noun that follows.

Key facts

• A fronted negative adverb inverts the auxiliary and subject: Rarely have I seen such rain.
• In a there-sentence, there takes the subject position in the inversion: Rarely has there been.
• In a there-sentence the verb agrees with the noun that follows: has there been a consensus, have there been complaints.
• Without the fronted adverb the order is normal: There has rarely been such a consensus.

Common traps

• Picking there has been because it reads naturally, missing that the fronted Rarely demands inversion
• Picking was there because it is inverted, without checking whether the sentence gives a past time frame
• Inverting after a cleft opener, where It was not until the report leaked that the ministry acted keeps normal order

No directly related past PYQ was found.