Which section of the article highlights the idea that reused boosters are essential f
accomplishing SpaceX's other goals in space travel?
(A) Introduction (paragraphs 1-3]
(B) "SpaceX Aiming For 24-Hour Turnarounds For Boosters"
(C) $1 Billion Spent On Recycled Booster Effort"
(D) "More Reused booster launchers coming"