Two sailboats are traveling along the same path away from a dock, beginning from different locations at the same time. John's boat begins 20 miles from the dock and is 55 miles from the dock after 5 hours. The distance of Roberta's boat from the dock is represented by the function y = 6x + 10, where x represents time and y represents the distance from the dock. Which boat was farther from the dock at the beginning, and which traveled more quickly? A. John's boat was farther from the dock at the beginning, and it traveled more quickly B. John's boat was farther from the dock at the beginning, but Roberta's boat traveled more quickly C. Roberta's boat was farther from the dock at the beginning, but John's boat traveled more quickly D. Roberta's boat was farther from the dock at the beginning, and it traveled more quickly.