To determine the appropriate domain for the problem, we need to examine the function \( f(t) = 8(2)^t \) that models the number of fruit flies after \( t \) days. We know that Annabel will bake the banana bread 5 days after returning from the market, which helps us set the limits for \( t \).
Since \( t \) represents the number of days after starting (when she returned from the market), the most reasonable domain in this context is:
\[ 0 \leq t \leq 5 \]
This means that the number of days \( t \) can start from 0 (the day she returned) and go up to 5 (the day she bakes the banana bread).
Therefore, the correct response is:
0 ≤ t ≤ 5.