Choose an appropriate word that can substitute the bracketed word and complete the sentence meaningfully.
Shelley was very happy (while) I accepted her invitation to her birthday party.

Correct option is A

Option Meanings:
· When – at the time of.
· Before – earlier than.
· After – later than.
· As – at the same time; or because.
Correct Answer: (a) when
The sentence refers to the moment the speaker accepted the invitation. "When" accurately denotes that time.
Other conjunctions would alter the timeline.
Correct Sentence:
Shelley was very happy when I accepted her invitation...