Complete the dialogue by choosing the correct option to fill in the blank:
Mother: Son, you ____________ (are working since/have been working since) morning. Perhaps it's time you took some rest.
Son: Mom, I _________ (am not as tired/was not as tired) as you think. But since you say so, I will _________ (took some rest/take some rest).
The correct option is
C
have been working since; am not as tired; take some rest