The Basic Idea Behind the Planetesimal Hypothesis Is That

The basic idea behind the planetesimal hypothesis is that

A) planets form as a direct result of the nuclear fusion of nebular gases and planetesimals.
B) planets form from the remains of super-giant planetesimals that undergo nuclear fission and blow apart,thereby creating smaller objects-the planets.
C) early in the solar system's history,a star passed near to the Sun and pulled off gases that eventually condensed to form planets.
D) matter in a nebula experiences mutual gravitational attraction,and this results in the gradual accretion of larger and larger bodies-planetesimals.
E) electrical space storms charged particles that were attracted together to form planets.