Which One of the Following Statements Correctly Describes a Major

Multiple Choice

Which one of the following statements correctly describes a major difference between galaxy formation with cold dark matter and galaxy formation with hot dark matter?

A) In both cases, galaxies form by the breakup of larger objects, but the breakup occurs faster if the dark matter is hot than if it is cold.
B) With cold dark matter, galaxies form by the breakup of larger objects, whereas with hot dark matter galaxies form through the merger of smaller objects.
C) In both cases, galaxies form through the merger of smaller objects, but the merger occurs faster if the dark matter is cold than if it is hot.
D) With cold dark matter, galaxies form through the merger of smaller objects, whereas with hot dark matter, galaxies form by the breakup of larger objects.