Sitkin and bies suggest that negotiators who use multiple explanations are more likely to have better outcomes and that the negative effects of poor outcomes can be mitigated by communicating explanations for them.
a. true
b. false

That statement is true

Negotiators that use multiple explanations will have more chance to hide or divert the listener's attention from their true intention.
Or even if the listener know the intention, they will feel appreciated and felt that they've been taken seriously due to the explanations.

Ithink it’s bill gates.