What's the likely cause of this issue?

What’s the likely cause of this issue?

During lunch time in the break room of a company, Wi-Fi connectivity on the 2.4 GHz band is intermittent. Every other time of the day, it works fine.

What’s the likely cause of this issue?
A . Employees are using their cell data instead of using the Wi-Fi
B . The AP in the cafeteria keeps rebooting due to lack of PoE budget on the switch
C . Microwaves in the cafeteria are interfering with the Wi-Fi on the 2.4 GHz band
D . Toasters and ovens are heating up the air, raising the noise floor with the Wi-Fi on the 2.4 Ghz band

Answer: C