Mandy and Javier Are a Young Couple, While Vlad and Boris

Mandy and Javier are a young couple, while Vlad and Boris are a couple approaching old age. The couples met at a support group for patients who have recently been diagnosed with multiple sclerosis and their families. Which of the following is most likely?

A) Mandy and Javier are more likely to experience lower marital happiness post-diagnosis.
B) Vlad is more likely to become Boris' caretaker than Mandy is to become Javier's.
C) Vlad and Boris are more likely to experience lower marital happiness post-diagnosis.
D) Boris' condition will undoubtably be worse than Javier's.