"I" is in regards to yourself, you and any humans name are proper nouns that you go by. "a" is not a proper noun it is describing the quantity or the subject of the matter, Ex- [I] love it when [a] cool summer day takes place in my area.
{Bad sentence, sorry}
He spends Christmas all alone
Answer:
I'm guessing the second one and the last one... I never read the story.
Explanation:
I'm pretty sure its A. were starting to think the cat had gotten your tongue
