A man standing by the shore observes sea waves approaching at a frequency of 0.20 Hz. A man on a boat observes that waves are approaching the boat at a frequency of 0.50Hz. The speed of the waves is 2.0ms . Which of the following gives a possible value for the speed of the boat and its direction? Speed / ms Direction A. 3.0 away from the shore B. 3.0 towards the shore C. 1.2 away from the shore D. 1.2 towards the shore