Why are massive main-sequence stars not likely to have planets that contain life
A) The life zones around these stars is too small.
B) These stars would sweep away all of the material from which planets could form.
C) These stars are too hot to allow water to exist as a liquid on any planets that might form.
D) These stars are on the main sequence for too short a time to allow life to evolve.
E) These stars are almost always binaries and planetary orbits are unstable around binaries.
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