Helpers Wanted

Hey,

I have a question, which one is harder? Having to keep 1 promise or having to keep 3 or 4 promises? If, say, A has to keep 1 promise to B who has to keep 3 or 4 promises and both of them break their promises, one for each party, would it be those 2 promises cancel each other out? I am at a limbo here and I need help....