Hi, we are looking for an answer choice that does not describe a flaw in the argument, and A is a possible line of attack against the lawyer. The lawyer is trying to prove that the C didn't want the project to fail, and as evidence, we are told that C assigned the best staff to the project. This evidence seems to support the fact that C wanted the project to succeed, however, if A were true, we would have reason to doubt that C wanted the project to succeed. If C had been forced to assign the people, then C did not choose to, which undermines the evidence that C wanted it to succeed.
