Answer:
C. F#
Step-by-step explanation:
All the space notes on the treble staff spell the word "face"
F A C E
The note is on the first space, so that means it is an F. The sharp symbol (#) shows that the note is an F#. Therefore, the answer is C. F#.
Have a lovely day!
(If you have any more trouble with notes, let me know and I will try to help!)