Answer:
A. Omit the apostrophe in the father's.
Explanation:
You want a plural form here rather than a possessive form.
Answer:
The answer is number 2
Step by Step Explenation:
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