"racism is an insidious disease." what does insidious mean in this sentence/context? a. unusual b. harmful c. contagious d. invisible

B. harmful.

Explanation: Insidious is often used to describe something that usually seems harmless or inoffensive, but that actually causes great harm or a terrible effect. In the given case, the word "insidious" is used before the word "disease" and this two words describes the word "racism", so, in this context, the word insidious have the meaning of something that is very harmful.

i think that the quotes in paragraph 11 contribute to the development of ideas because it provides a good reasoning of the central idea of the text.