I wrote a whole summary ,but it somehow got deleted, I'll just give you the answer: B.
your question is wrong please recheck and repost question
He's capable of doing his homework by himself. (Sorry, the only think I had on mind) Since she spent almost all of his money, the remainder is countable even for a tyke. Those plants are eatable and commonly used in cooking.
The best way to write the possessive of circus in the singular form is circus'