Large Meteors Can Strike the Earth with Speeds Of $80,000 \mathrm {~km} / \mathrm { h }$

Multiple Choice

Large meteors can strike the Earth with speeds of $80,000 \mathrm {~km} / \mathrm { h }$ . Such a meteor hits the Earth (radius $6.37 \times 10 ^ { 6 } \mathrm {~m}$ ) at a point on the plane of the Earth's equator at $80,000 \mathrm {~km} / \mathrm { h }$ , resulting in a change of the Earth's angular momentum of $80.0 \times 10 ^ { 12 } \mathrm {~kg} \cdot \mathrm { m } ^ { 2 } / \mathrm { s }$ . The meteor's mass is

A) 13.0 kg.
B) 56.0 kg.
C) 126 kg.
D) 565 kg.
E) 637 kg.