One Reason We Know More About the Surface Composition of the Asteroid

One reason we know more about the surface composition of the asteroid Vesta than about most other members of the asteroid belt is that

A) Vesta's volcanoes still spew out a lot of material that goes into orbit around Vesta
B) Vesta's surface is made of water ice and is extremely reflective
C) pieces of Vesta have landed on Earth as meteorites
D) Vesta's orbit crosses the Earth's orbit roughly once a century
E) Vesta's surface markings happen to resemble a human face and thus have intrigued astronomers ever since this large asteroid was discovered