Can we draw the following hypothesis from the context (see options)? 

Context:

Lunch with friends<br>Amy and Nora went to the new Mexican place for lunch. They both ordered giant Margaritas and chips and salsa. Amy enjoyed a burrito and Nora had delicious fish tacos. While they were eating, a mariachi band came to their table. Before they left, they tipped the band because they were so good.

Hypothesis:  Amy and Nora tipped the waiter.
Pick from: (a). Yes; (b). It's impossible to say; (c). No;
(b).