I think the answer should be B. A) Out of context. No where it's mentioned about requiring support from other labor leaders. B) Being a experience Labor Organize and former head of one of the nation's powerful Labor unions, he must be a good communicator with labors. As the new council is for busine...

Spoiler Warning:

The Official Answer is D. Thanks for all explanation.

As far as I know, General principal of logical inference is that when you change the relation from positive to negative, the direction changes as well. E.g. A -> B so, not A <- not B, in other words, Not B -> Not A It's same as other mathematical concept... 1<5 if I multiply it by -1 then it will be...