How can you determine that a star is about to turn into a red giant? A. When the pressure inside the star exceeds its temperature
B. When a large amount of hydrogen has been turned into helium
C. When a large amount of helium has turned into hydrogen
D. When the star falls into the sun

The way you can determine if a star turns into a red giant is if  lacks fuel (Hydrogen) and it burns helium. This is how it can be determined .

Explanation:

for e2020. the answer would be some directions from the mountain range so we can find mt. whitney. to locate which direction is north, you should use a   compass. this would not only find mt. whitney, but also becuase of this long paragraph you would get points because it's not like anyone actually reads your work becuase once they read the first sentence it sounds dumb enough to not read becuase i'm not good at answering this but the answer is compass for your benefit.

for e2020 ; -;