Which of the following sentences uses the present perfect correctly?
nosotros hemos resuelto comer menos.
nosotros han resolvido comer menos.
nosotros hemos resolvido comer menos.
nosotros han resuelto comer menos.

It's easier to eliminate negative self-talk when we              a.  ignore the fears that trigger it.    b.  actually hear the negative thoughts we think.    c.  let it turn into imagined risks.    d.  try not to think of the worst things that can happen.