Sophia wants a new photocopying machine for her department. She decides to write a letter to her supervisor. The primary audience of this letter is the .

The person who is in-charge or the supervisor of that department has the direct authority over the different stuff, and as per the person's request the supervisor will have the things delivered after analyzing the whole scenario.                                                                                                                              

Explanation:

Sophia wants a new photocopying machine for her department. She decides to write a letter to her supervisor. The primary audience of this letter is the supervisor.

It’s either d or b ! but it might be b