which event led to the formation of our solar system? a galaxy broke apart. a massive star exploded. a solar…

Brief Explanations:

The widely - accepted theory is that the solar system formed from the gravitational collapse of a solar nebula, a cloud of gas and dust. A galaxy breaking apart is on a much larger scale and not the cause of solar - system formation. A massive star explosion (supernova) can trigger star formation but is not the direct cause of our solar system's formation. Dark matter does not directly lead to solar - system formation.

Answer:

C. A solar nebula collapsed