Answer:
D. Most infants died before childhood.
Explanation:
Unfortunately, most children fell to disease and harsh conditions. Back then medicine was not evolved as it is now and most would die of the common cold. But it was also customary to have large families in order to support the family so kids often were used as labor and died in unfortunate accidents or from exhaustion. Today, there are many many laws protecting children from such things and medicine has evolved so most people in wealthy countries could live up to 70 years old if they take care of themselves.
Visual elements could be any sort of illustration or photographs or diagrams. These can all set the tone of the writing.
The rich only want to get richer, and leave poor people in the dust, so they pay people off to keep them happy enough to shove the rest of us down.
I believe the answer for that is anger/fear. I hope this help! <span />