A. affect
Affect can sometimes be a noun, but it is mostly used as a verb that describes some sort of change or difference.
On the other hand, the word effect is not an action nor verb; it is a noun that refers to the result of a cause.
“it should be clear to all of us” is persuasive in a way where he makes everyone else sounds wrong if they believe otherwise.
The answer is true because if you have experience you can look back on the day it happened.
Answer:
formal
Explanation:
'strict' and 'harsh' are out because business letters are not meant to insult or criticise, but rather to be courteous (polite). 'fancy' is out because business letters do not use unnecessarily flowery language.
as such, that only leaves us with 'formal' which is an appropriate tone for a business letter since it conveys a sense of seriousness.
i hope this helps! :D