Read this sentence from paragraph 4.
The weightlessness felt on some rides is what astronauts experience constantly in space.
Why did the author choose to include this sentence in the paragraph?
A
to explain how NASA tries to identify young students who are interested in spaceflight
B
to show how astronauts learn fundamental physics through educational entertainment
C
to highlight how dangerous roller coaster rides are by comparing them to a rocket launch
D
to show how physics principles at amusement park rides apply to real-world situations
D
to show how physics principles at amusement park rides apply to real-world situations