Some sentences provide new information, while others elaborate, clarify, or restate the key concept of a paragraph. Which sentences from the text develop the key concept that the Curiosity landing was a tricky one? Select all that apply. (A) Curiosity still had to be slowly—and safely—deposited on the surface. (B) Throughout the cruising stage, the ship had to angle in at just the right trajectory, or track, in order to use the Mars atmosphere to slow its velocity. (C) The adventure began with the mission launch on November 26, and, after an eight-month journey crossing 354 million miles, the vessel approached its destination. (D) The Mars rover went right to work exploring the 96-mile-wide Gale Crater. (E) The contraption appears slightly animalistic, with its one cyclopean eye gazing from the main camera on its stalk neck. (F) Curiosity itself was safely housed in a heat shield that would have to separate and fall away as it approached the ground. (G) Curiosity even used a laser to vaporize layers of rock.