Identify the sentence that correctly employs the correlative conjunction pair 'not only... but also':

Answer and explanation

Correct answer: B. The geothermal project will not only generate baseload electricity but also provide thermal energy for district heating.

  1. Step 1: Correlative conjunctions require parallel grammatical elements immediately following each component. Step 2. In sentence A: 'not only [generate baseload electricity] but also [provide thermal energy]' coordinates two base verbs sharing the auxiliary 'will'. Answer: The geothermal project will not only generate baseload electricity but also provide thermal energy for district heating. Why not the others: Other choices fail parallel alignment between verbs.

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