Answer:
Option d.
Explanation:
To calculate the tip amount, we can multiply the total bill by the tip percentage (18%).
Tip amount = Total bill * (Tip percentage / 100)
Tip amount = $37.82 * (18 / 100)
Tip amount ≈ $6.81
Therefore, Jeff's tip should be approximately $6.81. Thus, the correct answer is option d.