Why does the rotation of a protostar slow down over time?

A) All rotating objects slow down over time.
B) Magnetic fields can transfer angular momentum to the protostellar disk and protostellar winds can carry angular momentum away.
C) The onset of fusion causes the rotation rate to slow dramatically.
D) Magnetic fields of other stars interact with the magnetic fields of the protostars, slowing its rotation.


B

Physics & Space Science

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