What size and type of tool, if any, is required to adjust the up/down tilt of the camera for the CTS

What size and type of tool, if any, is required to adjust the up/down tilt of the camera for the CTS-
3010?

A.
0.9 mm Allen wrench

B.
#1 Phillips screwdriver

C.
15 mm Allen wrench

D.
No tool is necessary, the tit can be adjusted by hand