Select the correct transition word: 'Solar desalination plants require high upfront capital; _______, their operational fuel costs are essentially negligible.'

Answer and explanation

Correct answer: A. however

  1. Step 1: Identify the logical relationship between high initial cost and negligible ongoing fuel cost (contrast).
  2. Step 2: The conjunctive adverb 'however' signals concession and contrast between two independent clauses separated by a semicolon.
Answer
however.
Why not the others: 'moreover' introduces addition; 'therefore' and 'consequently' indicate cause and result.

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