The new electric pencil sharpener does not work properly. I prefer the old manual one.
Which is the best way to combine the sentences?
A: The new electric pencil sharpener does not sharpen well; I prefer the old manual one.
B: The new electric pencil sharpener does not sharpen well: I prefer the old manual one.
C: The new electric pencil sharpener does not sharpen well, I prefer the old manual one.