In order to be able to answer this, we'd need to know what book it is you're reading, as well as the answer choices as the question asks "which of the following best" meaning that they want you to choose the best answer from the choices they’re giving you.
Answer:
Lots of people refer to cold as a personality like ruthless or mean so mint is just another way of saying something like her life was icy cold or she gave me the cold shoulder.
Explanation:
A restrictive adjective clause is not set off with commas. The correct answer would be the first option. Restrictive clause is a clause that cannot be omitted in the sentence for it will change the idea of the whole sentence. It is the opposite of non-restrictive clause--a clause that serves as an additional information that is set off with commas.
Answer:
Is this multiple choice? If so, give me the choices and I can answer for you! <3