Read this excerpt from "Edward Jenner and the History of Smallpox and Vaccination.” The origin of smallpox as a natural disease is lost in prehistory. It is believed to have appeared around 10,000 BC, at the time of the first agricultural settlements in northeastern Africa. It seems plausible that it spread from there to India by means of ancient Egyptian merchants.

What is the central claim of the excerpt?

It is difficult to trace the beginnings of smallpox.
Smallpox was most dangerous in prehistoric times.
Smallpox most likely originated from farms in India.
It is unclear how other diseases are related to smallpox.

What is the function of an economic system?

June and sylvio speak to mr. teller in the driveway of their farmhouse. it is raining hard, and they all carry umbrellas. a dog sits on the steps of the house. june: we didn’t think you’d be coming back for the puppy. mr. teller: i said i would when i dropped the puppy off. sylvio: yes, but that was months ago. we thought you’d be back for the puppy in a couple days. now she’s a full-grown dog. we have raised her ourselves, we built her her own doghouse, and we love her. mr. teller: but she’s my dog. i only dropped her off at your house for safekeeping since i had to go out of town on business. now i’m back and i want my dog back. what is the setting of this play? a basket a farm a doghouse a trip

How does the mother defend her child to the old duck