HELP choose the spanish subject pronoun that would replace the given subject

Proyecto: ¡a conversar! this project serves two purposes: to practice using spanish vocabulary that deals with shopping and bargaining to practice describing or giving information in spanish in writing remember, when you're asked to write in spanish, if you know a spanish-speaker, possibly a native speaker, it's to have that person read what you wrote and you make corrections and maybe give you a few ideas on how you can improve your writing skills in spanish. use the spanish vocabulary in this project to you with the conversation you'll write.

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. 

    the efforts of one good worker can often motivate others to reach their potential through a process called              a.  productivity.    b.  mentoring.    c.  modeling.    d.  perpetuity.