The appropriate domain for the problem, considering that Annabel bakes the banana bread 5 days after returning from the market, is the time interval from when Annabel returns home to when she bakes the banana bread.
This means \( t \) starts at 0 days (the day she returns) and goes up to 5 days (the day she bakes the bread).
Therefore, the correct answer is:
0 ≤ t ≤ 5.