Choose the word closest in meaning to lucid in the following sentence:

The guest lecturer provided an exceptionally lucid explanation of quantum entanglement, making complex theoretical physics accessible to undergraduate students.

Answer and explanation

Correct answer: D. clear and easily understood

  1. Step 1: Analyze context: the explanation made complex physics 'accessible to undergraduate students'.
  2. Step 2: 'Lucid' means expressed clearly, luminous, and easy to understand.
Answer
clear and easily understood.
Why not the others: 'obscure and deeply confusing' is the direct antonym; 'unnecessarily brief and hurried' implies superficiality; 'highly speculative and unproven' refers to scientific doubt rather than clarity of presentation.

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