Answer:
a, b, c
Explanation:
the last option is explaining a positive effect.
I'm going to answer this based on context, so it may not be accurate, but it's how I feel.
Eduardo doesn't communicate with his partner. He gets frustrated. Then he's filled with resentment. His partner is unaware. The relationship most likely won't be good from this point unless Eduardo learns to communicate with his partner. Otherwise, the relationship will most likely be out the window in a while.
Hope that helped! :)
Have a good day! :)
DISCLAIMER: ALWAYS. Heck with a reliable source!
Sorry to take your point but what are the options?