Technician A says that any cleaning chemical can be used to clean aluminum parts or components. Technician B says that most chemical cleaners are strong soaps called caustic materials. Which technician is correct?

Technician B is correct

Explanation:

Most of the cleaning agents are usually caustic materials and they're mostly basic in pH (higher than 7) to avoid any form of reaction with the surface/object being cleaned.

Not any cleaning agent can be used to clean aluminum part because some cleaning agent might have reaction or adverse effect when used on aluminum part.

the first, second, and fifth options

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.