1) A girl stood on a beach and used a telescope to watch a boat sail away. As the boat went farther across the water, the girl saw:
OA) the entire boat, until she left the beach
B) only the boat's sails, because distance distorted the boat's appearance
C) only the boat's sails, because the horizon blocked the rest of the boat from sight
O D) the entire boat, because the line of sight curves with the Earth