Polina wants to use her background knowledge to make an inference. That means she will provide evidence to show the inference is correct. Find a detail that proves that the inference is real or true. Use her personal experience to help make the inference. Use an inference chart to help make the inference.

use her personal experience to help make the inference.

Explanation:

right on edge

i believe the answer is: b. mr. head had a long, tube-like face with a rounded open jaw and a short depressed nose.

this is because in the un-revised sentence it said that mr. heads face was long and tube-like, and he had a rounded open jaw. this is not a very grammatically correct because of how it seems to drag on with the and, replaced with, with, makes it sound more fluent in the description.

throughout history, economists have always thought  ..