Read the sentence below, which is a run-on sentence:

The Incas were an ancient people who lived in Peru they worshiped a sun god and grew many different kinds of potatoes.

There are several ways to fix this sentence. Which is NOT a good way to fix it?
The Incas, an ancient people who lived in Peru, worshiped a sun god and grew many different kinds of potatoes.
The Incas were an ancient people who lived in Peru. They worshiped a sun god and grew many different kinds of potatoes.
The Incas were an ancient people. The Incas lived in Peru and worshiped a sun god and the Incas grew many different kinds of potatoes.
The Incas were an ancient people who lived in Peru and worshiped a sun god. They grew many different kinds of potatoes.