Read the following context and choose the best option to answer the question.
Context: The owner , Giuseppe , had told us that he 'll sometimes make this for dinner at home , served over spaghetti . Since Monday evenings are slow in the restaurant , we felt okay asking the waiter to see if the chef would be willing to make such a dish for us . He was , and did , and it was absolutely divine .
Question: why are monday evenings slow for the restaurant ?
Options: 
A. the restaurant is not open on mondays
B. None of the above choices .
C. most people are working on monday evenings with busy schedules
D. the restaurant closes early on mondays


C