Which shows the correct order of processes leading up to the formation of a main sequence star?

First, gas and dust condense into a nebula. Gravity then pulls the nebula inward, causing it to collapse and spin; as material gathers at the center, a protostar forms. When the protostar becomes hot and dense enough, nuclear fusion begins, marking its development into a main sequence star. Thus, the correct order is the one in choice C.

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