I am pretty sure it is C.
Generosity is being kind and giving something, and C is the only choice where she is giving something, which is time
I hope this is the correct answer!
It best described as Changing, through life
for Example :
The older we are, the less we need caloric intake because we do a lot less physical activity
But when we're old our need for fiber intake will increase because we can't digest our food like our younger days
Stomach, liver, gall bladder, and pancreas