The correct answer is: A. awkward
An awkward silence is a period of silence that is uncomfortable or embarrassing because no one knows what to say. It can happen in any situation, but it is most common in social settings where people are not familiar with each other. Awkward silences can be caused by a number of things, such as a lack of common ground, a misunderstanding, or a sudden change in topic.
In the context of the question, the speaker is describing a situation where there was a period of silence after an announcement. This could be because the announcement was unexpected or surprising, or because it caused people to feel uncomfortable or uneasy. Whatever the reason, the silence is likely to have been awkward for everyone involved.
The other options are not as likely to describe the situation in the question. An uneasy silence is a period of silence that is filled with tension or anxiety. An eternal silence is a period of silence that seems to go on forever. An eerie silence is a period of silence that is filled with a sense of dread or foreboding.
In conclusion, the correct answer is: A. awkward