C because if you look at it 1 1/4 it passes 2 1/4 so you know it’s gonna be 1 something and 2 1/2 is one after 2 1/4 so to get to 3 1/4 that would be 3 so 1 1/4 is the answer... if that make sense if not I can write it out to you and send a picture of how it’s worked out
