In the grocery store one evening, Yolanda is in a good mood after earning a promotion at work, but ...

In the grocery store one evening, Yolanda is in a good mood after earning a promotion at work, but Trudy is feeling quite guilty for stealing office supplies from work. When another shopper collapses on the ground unconscious,
 
  Yolanda would be likely to help according to the ________, while Trudy would be likely to help according to the ________.
  a. kinship effect; feel bad, do good effect
  b. feel good, do good effect; evolutionary explanation
  c. feel good, do good effect; feel bad, do good effect
  d. kinship effect; evolutionary explanation