Final answer:
The correct answer is 'b. it'. The pronoun 'it' is used to refer back to the bagel, as we would say 'I ate it in my car'.
Step-by-step explanation:
The correct answer is b. it.
In this sentence, ' a bagel with cream cheese ' is the subject of the sentence. The pronoun 'it' is used to refer back to the bagel, as we would say 'I ate it in my car'.
To further illustrate, we can replace ' a bagel with cream cheese ' with a proper noun like 'John'. The sentence would then be 'I got John and ate him in my car.' So, the correct pronoun to use when referring to an inanimate object like a bagel is 'it'.