To determine the appropriate domain for the problem, we need to consider the variable \( t \), which represents the number of days after Annabel returned from the market. Since she bakes the banana bread 5 days later, the time period we are concerned with is from the day she returns with the bananas (which we can consider as \( t = 0 \)) to the day she bakes the bread (which is \( t = 5 \)).
Thus, the appropriate domain for \( t \) is:
\[ 0 \leq t \leq 5 \]
So, the correct response is:
0 ≤ t ≤ 5.