"We must make allowances for her because she has been ill" means that we should be understanding and make some adjustments for her because she is not feeling well.
"Pardon" means to forgive someone for something they have done wrong.
"Apology" means to say sorry for something you have done wrong.
"Excuses" means to give reasons to explain why something happened the way it did.
Answers & Comments
The correct answer is B. allowances.
"We must make allowances for her because she has been ill" means that we should be understanding and make some adjustments for her because she is not feeling well.
"Pardon" means to forgive someone for something they have done wrong.
"Apology" means to say sorry for something you have done wrong.
"Excuses" means to give reasons to explain why something happened the way it did.