I’m rebuilding a 250 that came out of a 1973 Chevy C-10. I need some help identifying what sensors or other items came out of some of the holes on the block. See attached pictures that will correspond to the below.

Locations A and B:
The image can be found here: https://imgur.com/a/luAhBks

A: Oil Pressure Sensor? (I already installed one so I think this is correct)
B: ??

Locations C, D, and E:
The image can be found here: https://imgur.com/JU13WPj

C: Water Temp Sensor??
D: ??
E: ??

Thank you!