Select the most appropriate option to fill in the blank.
She was waiting for them for a long time, ______?

Correct option is C

The correct option to fill in the blank is (c) wasn’t she.
Explanation: Question tags repeat the auxiliary from the main clause, reverse the polarity, and use a pronoun matching the subject. Main clause: She was waiting… (affirmative, auxiliary was). Therefore, tag = wasn’t she? (negative + subject pronoun she). (हिंदी भाव: “वह काफ़ी देर से इंतज़ार कर रही थी, है ना?”)
Example: They were late, weren’t they? / He is ready, isn’t he?
Explain why other options are incorrect.
· (a) weren’t they: wrong auxiliary ( were ≠ was) and wrong pronoun ( they ≠ she).
· (b) was she: same polarity as the statement — tag must be negative.
· (d) were they: wrong auxiliary and pronoun.
Information booster (tags): Imperatives often take will you? / won’t you?; with Let’s, use shall we?; with negative statements, the tag is usually affirmative.