Which Characteristic Is NOT Typical of Our Planetary System

Which characteristic is NOT typical of our planetary system?

A) The spin axes of most of the planets are aligned to within 30° to the perpendicular of the orbital plane.
B) The orbits of most of the planets are almost circular.
C) Most of the planets orbit the Sun in the same direction.
D) The physical size of most of the planets is about the same.

Correct Answer:

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