The newly launched healthcare scheme extends the assurance in the provisions to reduce the risk what many analysts had predicted previously, and rather to limit the losses insurers incur from higher than expected medical claims.

(A) in the provisions to reduce the risk what many analysts had predicted previously, and rather to limit
(B) in the provisions to reduce the risk what many analysts predicted previously, rather to limit
(C) in the provisions’ ability to reduce the risk what many analysts were predicting previously, and rather to limit
(D)that the provisions will reduce the risk that many analysts had predicted previously and limit
(E) that the provisions will reduce the risk that was predicted previously by many and limiting

source - CrackVerbal
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IMO D

(A) in the provisions to reduce the risk what many analysts had predicted previously, and rather to limit .Not parallel
(B) in the provisions to reduce the risk what many analysts predicted previously, rather to limit .Incorrect
(C) in the provisions’ ability to reduce the risk what many analysts were predicting previously, and rather to limit.Wrong tense and parallel structure.
(D)that the provisions will reduce the risk that many analysts had predicted previously and limit. Correct.
(E) that the provisions will reduce the risk that was predicted previously by many and limiting. Wrong verb tense.

Correct me if I am wrong.
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+1 for D .the use of that seems idiomatic after the word assurance.. Will reduce and limit are parallel.

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Official Explanation:

Answer - D
Concepts tested: Parallelism, Tenses

This is the sequence of events:
Event 1: Analysts predicted that there would be a risk
Event 2: The new healthcare scheme is launched. It extends the assurance that the provisions will reduce the aforementioned risk and limit the losses faced by insurers.

To bring out this sequence, we need to use the past perfect tense to refer to event 1 and the simple past tense to refer to event 2. This is correct only in option D.

The core sentence is “The newly launched scheme extends the assurance that the provisions will (1) reduce the risk that many had predicted previously and instead (2) limit the losses insurers incur…” This parallelism is missing in all options except D.

A - What’ can be used only as an interrogative pronoun or adjective to ask questions. It cannot be used in place of a relative pronoun such as ‘that’ or ‘which’. In this sentence, we need the relative pronoun ‘that’.
B – Same as A. ‘Assurance in X to Y’ is unidiomatic.
C – Same as A.
D – This option is parallel as described above.
E – Same as A.
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Experts,

will you pls suggest why option B is wrong.

1. In terms of verb tense, all clause are in present simple so past perfect doesn't look mandatory out here. Rather simple past should also serve the purpose.

2. Option B and D do have different meaning. Option B says it will not reduce the risk rather limit the losses. It is inline with main sentence.
WHereas option D suggest it will do both. SO there is a change in meaning.

SO in my opinion option B looks more appropriate. Pls suggest.