Choose the correctly edited sentence.

Original sentence:

Most American car horns beeps in the key of F, a listener with a good ear can tell a domestic made car from a foreign made car by listening to its horn.
Question 2 options:

Most American car horns beep in the key of F, a listener with a good ear can tell a domestic-made car from a foreign-made car by listening to its horn.

Most American car horns beeps in the key of F. A listener with a good ear can tell a domestic-made car from a foreign-made car by listening to its horn.

Most American car horns beep in the key of F. A listener with a good ear can tell a domestic-made car from a foreign-made car by listening to its horn.

Most American car horns beep in the key of F. A listener with a good ear can tell a domestic made car from a foreign made car by listening to its horn.

Third Option - Most American car horns beep in the key of F. A listener with a good ear can tell a domestic-made car from a foreign-made car by listening to its horn.

Explanation:

The third option correctly separates the two different independent clauses in the sentence by using a period.

First Clause: Most American car horns beep in the key of F.

Second Clause: A listener with a good ear can tell a domestic-made car from a foreign-made car by listening to its horn.

Moreover, the verb indicating the subjetc's action must be in plural (beep, with no s at the end) given that the subject itself is plural (Most American car horns), and the adjectives describing the objects in the second clause - domestic-made and foreign-made - must have a dash prior to the describing verb (made) in order to make them compound adjectives.