Earth Has a Radius of About 6400 Km, the Sun $7.0×10^5$

Multiple Choice

Earth has a radius of about 6400 km, the Sun has a radius of about $7.0×10^5$ km, and a rubber ball has a radius of 6.4 cm. If you were to construct a scale model of the solar system using the rubber ball to represent Earth, what is the radius of a ball needed to represent the Sun in your model

A) $7.0 × 10^5$ cm
B) 7.0 cm
C) 700 cm
D) 70 cm
E) 7000 cm