Read each sentence to find out whether there is any grammatical error in it. The error, if any will be in one part of the sentence. The letter of that part is the answer. If there is no error, the answer is 'D'. (Ignore the errors of punctuation, if any). (solve as per the direction given)

The sentence reads: "The President had hardly spoken a few words when the microphone stopped functioning." Let's break it down to identify any grammatical error:

1. Option A - The President had hardly spoken:
   • This part is grammatically correct. "Had hardly spoken" is properly used in the past perfect tense to indicate an action that occurred before another action in the past.
2. Option B - a few words:
   • This part is also correct. "A few words" is a proper noun phrase and fits logically with the verb "spoken."
3. Option C - when the microphone stopped functioning:
   • This part is correct. The use of "when" is appropriate here because it shows the time when the microphone stopped functioning, following the past perfect tense.
4. Option D - No error:
   • There are no grammatical errors in the sentence. All parts are correctly structured.
5. Final Answer:
   • The sentence is free of errors, so the correct answer is D. No error.