The correct answer is B) Horizontal movement of the water away from the land following high tide. An ebb current refers to the outgoing tide, when the water moves away from the land following high tide. As the tide recedes, the water flows out to sea, creating a horizontal movement of the water away from the shoreline. This is in contrast to a flood current, which is the incoming tide and movement of water toward the land following low tide. The other answer choices are incorrect because they do not accurately describe the definition and direction of an ebb current. Options A, C, and D all reference the wrong tide stage or the wrong direction of water movement.