Which of the following best describes the evolutionary track ...

[RRMR]

Which of the following best describes the evolutionary track followed on the H-R diagram for the most massive stars?
 
  A) vertically upward, along the left edge of the diagram
  B) diagonally to lower right, then vertical, then horizontally left
  C) horizontally right, diagonally to lower left, then horizontally right
  D) horizontally right
  E) horizontally right, then forms a clockwise loop

Question 2

Although theory says a massive black hole with an accretion disk should be emitting X-rays, many black holes emit:
 
  A) mostly in the infrared.
  B) only in the visible.
  C) mainly in the gamma.
  D) virtually no radiation at all.
  E) equally across the entire electromagnetic spectrum.

[blfontai]

Answer to Question 1

D

Answer to Question 2

A

[RRMR]

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[blfontai]

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