What struggle is illustrated by the following passage?

What struggle is illustrated by the following passage?

"'There is an abundance of life here,' he says. 'All these children playing in the open air and these young people working in the fields...And in all this happiness,' he adds, 'there's also despair and suffering.'"

Question 1 options:

A) 

Atheism vs. faith

B) 

The struggle of the young against the old

C) 

Humans vs. nature

D) 

Life's combination of problems and joy