Can we draw the following hypothesis from the context (see options)? 

Context:

How to build a simple workbench<br>Start with tools that are needed. You will need a drill, a drill and screw bit set, a saw and a carpenters square to make sure that all your cuts are not crooked, and something to haul materials to and from the lumberyard. Buy the thickest plywood you can afford.

Hypothesis: Your cuts will be crooked without a carpenters square.
Options:
[a]. Yes;
[b]. It's impossible to say;
[c]. No;
[b].