Choose the option that most effectively synthesizes the two ideas into a single, cohesive academic sentence:

1. The deep-sea submarine encountered extreme hydrostatic pressure at nine thousand meters.
2. The carbon-fiber hull remained intact and retrieved pristine core sediment samples.

Answer and explanation

Correct answer: D. Notwithstanding extreme hydrostatic pressure, the submarine hull remained intact and retrieved sediment samples.

Answer: Notwithstanding extreme hydrostatic pressure, the submarine hull remained intact and retrieved sediment samples. Why not the others: 'Because of extreme hydrostatic pressure, the submarine hull failed...' contradicts the fact that the hull stayed intact; 'whereas' wrongly sets up an adversative clause rather than a concession; 'Encountering extreme hydrostatic pressure...' misattaches the participle to 'sediment samples', creating a dangling modifier.
  1. Step 1: Analyze the relationship between the two premises: there is a concession between the severe pressure and the successful maintenance of hull integrity, which enabled sample retrieval.
  2. Step 2: The sentence uses the formal preposition 'Notwithstanding' to set up the concessive relation concisely and avoids dangling modifiers.

Practise more Cohesive Devices, Discourse Markers, and Error Identification.

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