To Be Accepted as a Reasonable Picture of the Formation

Multiple Choice

To be accepted as a reasonable picture of the formation of the solar system, the nebular hypothesis must explain all of the these statements except one. Which is the exception?

A) All the planets orbit the Sun in the same direction.
B) All the planetary orbits lie close to the ecliptic.
C) The magnetic fields vary greatly in magnitude and direction.
D) The vast bulk of the solar system's mass lies in the center.