The correct answer would be B) No because there is only one negative in the sentence and that would be ''aren't'' since that means are not, so since that's only one, and not two, its not a double.
When they are used to describe or modify a noun.
For examples:
"You may leave through either door."
"Donald Trump aims to garner the most votes."
Using the same pattern of words to show that two different words have the same importance.
Answer:
Rusting is all in all common when metal atoms react with the environment. However, salt water does not make metal rust, it does accelerate the rusting process of it
