Choose the correctly edited sentence.

original: amazonian indians invented galoshes centuries ago buy dipping there feet into liquid rubber. to protect theirselves against insects on the ground.

(hint: look for errors with pronoun usage, using the right word, and a sentence fragment.)
question 5 options:

amazonian indians invented galoshes centuries ago by dipping their feet into liquid rubber, to protect themselves against insects on the ground.

amazonian indians invented galoshes centuries ago by dipping their feet into liquid rubber to protect themselves against insects on the ground.

amazonian indians invented galoshes centuries ago by dipping their feet into liquid rubber. to protect themselves against insects on the ground.