For the first 400 million years or so after the formation of the solar system,the rate of bombardment by large objects decreased.Then,from about 400 million to 700 million yaers after the formation,this rate increased again.What is believed to be the cause of this increase,the period of Late Heavy Bombardment?
A) The Sun flared out during an unstable period in its development.
B) A star passed near our solar system and exerted a gravitational pull on the asteroid belt, scattering the asteroids there.
C) Tidal pull from Jupiter disrupted a planet between the orbits of Jupiter and Mars, and the resulting debris moved through the inner solar system.
D) Jupiter moved through the asteroid belt, sending asteroids moving in all directions.

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The Answer of For the first 400 million years or so after the formation of the solar system,the rate of bombardment by large objects decreased.Then,from about 400 million to 700 million yaers after the formation,this rate increased again.What is believed to be the cause of this increase,the period of Late Heavy Bombardment?
A) The Sun flared out during an unstable period in its development.
B) A star passed near our solar system and exerted a gravitational pull on the asteroid belt, scattering the asteroids there.
C) Tidal pull from Jupiter disrupted a planet between the orbits of Jupiter and Mars, and the resulting debris moved through the inner solar system.
D) Jupiter moved through the asteroid belt, sending asteroids moving in all directions.

For the First 400 Million Years or So After the Formation