I’m stuck in between C and D.

Which statement is the best synthesis of information from these two sources?
Source 1: Young people report higher rates of loneliness than older
people.
Source 2: Loneliness is linked to depression and health problems.

A. We need to teach young people proven ways to overcome
loneliness.
B. People who have new jobs report particularly high levels of
loneliness.
C. We need to address loneliness to help young people live long,
healthy lives.
D. We need to figure out why young adults feel lonelier than older
people.