Which of the following statements is TRUE?

A.
Sniffers operate on Layer 2 of the OSI model

B.
Sniffers operate on Layer 3 of the OSI model

C.
Sniffers operate on both Layer 2 & Layer 3 of the OSI model.

D.
Sniffers operate on the Layer 1 of the OSI model.

Explanation:
The OSI layer 2 is where packet sniffers collect their data.
https://en.wikipedia.org/wiki/Ethernet_frame