Which of the following statements about spectral types of stars is true?
A) The spectral type of a star can be used to determine its surface temperature.
B) A star with spectral type A is cooler than a star with spectral type B.
C) A star with spectral type F2 is hotter than a star with spectral type F3.
D) The spectral type of a star can be used to determine its color.
E) All of the above are true.
E
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