When planning space exploration, scientists face many challenges. One issue is the weight of the items being transported. They can use the engineering design process to help minimize the weight of materials on board a spacecraft The engineering design process starts with a statement of the problem to be solved. Which sentence best states the problem described above? A. Space vessels must carry heavy equipment but also minimize weight O B. Lower gravity on the Moon means that objects weigh less on the Moon than on Earth. O C. The longer a space flight will last, the more equipment must be carried D. Metal is stronger than plastic, but it is also much heavier,