Identify the choice that is a run-on sentence. Rubber, which is inexpensive and durable, is used to make car tires.
O Aluminum is a lightweight metal steel is a very heavy metal.
Cars used to be made mostly of metal parts, but now plastic makes up about half of the construction of new cars.
Steve collects antique cars; he especially likes to restore classic muscle cars.

16.) true

17.) true

18.) it doesn't say

19.) true

20.) false

explanation:

the symbol of the grandfather's heritage in this excerpt from "the medicine bag,” is the beaded bolo tie.

a bolo tie is a cord fastened around the neck with an ornamental clasp which is worn as a necktie. they have been used by native american tribes such as hopi, navajo, zuni, and puebloans since the mid-20th century.

therefore, the fact that the grandfather is wearing a bolo tie refers to his heritage as native american.