How is the comma used as an interrupter in this sentence?

Answer:


How is the comma used as an interrupter in this sentence?
If this car, an old junk heap, ever starts, we shall go!

appositive
direct address
parenthetical expression
summary
coordinate adjectives preceding a noun
First answer by XTinyHeart. Last edit by XTinyHeart. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 1 [recommend question].