Answer:
Step-by-step explanation:
Hi!
To solve this first we should know what an absolute phrase is. An absolute phrase is a phrase that modifies a noun in a sentence although it's not connected to the sentence by a conjunction. The absolute phrase follows a coma, and if it would be removed from the sentence, its meaning wouldnt be affected.
In this case, we could write it like this: He wanted a car, and he couldn't stop talking about it.