According to the excerpt, what helped Einstein to draw the conclusion that space was like a stretchy blanket rather than rigid nothingness, as Newton believed? A. This new idea about space changed the way scientists think about gravity.
B. Most of the time gravity seems to work the way Newton described it.
C. Newton's rules explain a lot, from falling apples to most planets' orbits.
D. Mercury's orbit—up close to the Sun—has a blip in it that Newton's laws can't explain.