What does this symbol mean

its a 3/4 quarter meaning instead of playing as a 4 beat u play three beats in a measure meaning that its 3 beats as fast not like 4/4 which is normal but this is like 3 beats so like a whole measure is 3 beats

Explanation:

3/4 time signature

Explanation:

The 3/4 time signature means there are three quarter notes (or any combination of notes that equals three quarter notes) in every measure. because there is a 4 on the bottom, the quarter note gets the beat (or pulse)

so pretty much there will be 3 notes in each measure at most, it was to equal three quarter notes.  The quarter note will get the beat which is also referred to as the pulse.

your question isn't complete

i would think b and c