Answer: i believe it is the hook
In my own opinion, I say the world has progressed worst. There are good times and bad. Normally there bad.
Start off with this
or if u agree
In my own opinion the world has changed wonderfully and everything in it is just great. All of the world gets along or close enough to so.
I would say D, cause and effect.
the text explains how the amount of time effects the health of the person. I might be wrong, but it seemed like the best possible answer.