A scale drawing of a triangular sign has a scale factor of 1:8. Which statements are true? a. The ratio of the area of the scale drawing to the area of the sign is 1:8.

b. The ratio of the area of the scale drawing to the area of the sign is 1:16.

c. The ratio of the perimeter of the scale drawing to the perimeter of the sign is 1:8.

d. The ratio of the area of the scale drawing to the area of the sign is equal to the square of the scale factor.