Answer:I would say that the answer is number D
Explanation:
The plural form of the word radius is <em>radii</em>.
I know it sounds weird, but this is correct. Adding <em>-s </em> at the end of the radius would make the word grammatically incorrect. This is because the word radius itself is a Latin word.
- Marlon Nunez
Well you got to give us the name of the book or else we are clueless on what do help you on
Answer: ( D ) His lack of knowledge about the Wilks family.