Which Example Below Uses the Meaning of Ratio Called Ratio

Multiple Choice

Which example below uses the meaning of ratio called ratio as an operator?

A) A box of toys contains 3 airplanes and 4 toy soldiers. The ratio of airplanes to toy soldiers is 3:4.
B) Traveling at 65 miles per hour can be written as 65:1.
C) A model airplane has a scale factor of 100:1 on the box. So, if the real airplane is 200 feet long, the model would be 2 feet long.
D) If it takes 4 eggs and 3 cups of flour to make a cake, this can be stated as a 4:3 ratio of eggs to flour.