Based on the H-R diagram, what is the most likely characteristic of a main sequence star with a surface temperature of 25,000 K?

A main-sequence star with a surface temperature of 25,000 K is very hot, placing it toward the hot end of the main sequence on an H-R diagram. Hot main-sequence stars are generally massive and highly luminous, and they use up their fuel quickly, so they have relatively short lifespans. This matches choice D.

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