human

In the following sentence, "The box does not fit into the car because it is too small," what does the word "it" refer to?

Before answering this question we first think through the what the "it" could refer to and then we how likely the different options are:
gpt
--- Reasoning ---
1. Is the question multiple-choice question?
No
2. Is it implied multiple-choice question?
Yes

--- Answer ---
grounded