The singular noun in this sentence would be the word "Sand" because it's talking about the "Hot sand".
He walked across the hot "sand", hot is used to describe the word sand.
Thus your answer.... B. sand.
Hope this helps. :)
Answer: C hey both object to the way the DAR treats Marian Anderson
Answer:
I already know that my friends are throwing a surprise party for me, but Mr. Crocker is still trying to keep it a secret.
Explanation:
It needs correct subject/verb agreement.
I believe the answer is A