Read the following sentence from the section "The Satellites Layer."
But in the thermosphere, the
temperature can reach up to 4,500
degrees Fahrenheit.
What does the author mean by "up to 4,500
degrees"?
A
It cannot be any cooler than 4,500 degrees.
B
It has to always be at least 4,500 degrees or
hotter
С
It can get as hot as 4,500 degrees, but not
any hotter.
D
It is 4,500 degrees most of the time.