Answer:
A
Explanation:
It is invalid because the information is not sufficient to infer that all dachshunds are black since his dog is black and a dachshund.
The chairman's of the Board microphone was turned off, so we could not hear what he said.
What is a conjunction?
A conjunction is a part of speech that is used to connect words, phrases, clauses, or sentences. Conjunctions are considered to be invariable grammar particle, and they may or may not stand between items they conjoin.
I'd say it's: If I were a more optimistic person, I would put my house on the market. I hope this helps. Let me know if it was right.