To determine the sign of the product \(-16.8 \times \frac{3}{7}\), we can analyze the signs of each term:
- The number \(-16.8\) is negative.
- The fraction \(\frac{3}{7}\) is positive.
When you multiply a negative number by a positive number, the result is negative.
Therefore, the sign of the product \(-16.8 \times \frac{3}{7}\) is negative.
So, the answer is B) negative.