Question

using the correct wrench
the type of wrench you use depends on the accessibility and the force to be transferred. the wrench that grips the most faces of nut or bolt is preferred. if the wrench grips on all faces, a relatively large force can be transferred without causing damage to the bolt or nut.
accessibility is a limiting factor when selecting the right tool. this is why you sometimes have to use a tool thats not the most highly preferred.
1
what affects the tool selection?
whether the fastener is a bolt or a nut.
the amount of force required to loosen or tighten the nut/bolt.
the accessibility of the nut or bolt.

Explanation:

The text states that the type of wrench depends on accessibility and the force to be transferred. It also mentions that a wrench gripping the most faces of nut/bolt is preferred for force - transfer, and accessibility is a limiting factor. There is no mention of whether the fastener is a bolt or a nut affecting tool selection. The force required and accessibility do affect it.

Answer:

B. The amount of force required to loosen or tighten the nut/bolt.
C. The accessibility of the nut or bolt.