Which piece of evidence would be relevant to the claim "Mulligan's T-shirts has the best prices in town"?

A:Mulligan's t-shirts are more expensive than the ones on the internet.
B:There are several different cuts of t-shirts available.
C:The other store in town charges 25% more for the same designs.
D:Mulligan's offers more colors than any other store.

C: The other store in town charges 25% more for the same designs.