On a Hertzsprung-Russell diagram, where would we find stars that ...

[viki]

On a Hertzsprung-Russell diagram, where would we find stars that have the largest radii?
 
  A) upper right
  B) lower right
  C) upper left
  D) lower left

Question 2

What does the technique of interferometry allow?
 
  A) It allows two or more telescopes to obtain a total light-collecting area much larger than the total light-collecting area of the individual telescopes.
  B) It allows two or more telescopes to obtain the angular resolution of a single telescope much larger than any of the individual telescopes.
  C) It allows us to determine the chemical composition of stars.
  D) It allows astronomers to make astronomical observations without interference from light pollution.
  E) It allows the same telescope to make images with both radio waves and visible light.

[krakiolit]

Answer to Question 1

A

Answer to Question 2

B

[viki]

Thanks for the timely response, appreciate it

[xthemafja]

Great answer, keep it coming