Answer: Longshore currents always move in the same direction.
Explanation:
The movement of Longshore currents are affected by a variety of factors such as wind, waves and tides so the second option is a true statement.
Longshore currents generally follow the direction of Permanent offshore currents as they approach the coast so this is a true statement as well.
Local dive operators would have extensive knowledge of the area they work in because it is their job to know so they will definitely be good sources for information on the behavior of Longshore currents so this is another true statement as well.
Longshore currents however DO NOT always move in the same direction. As they are impacted by the factors listed above, they can move in different directions and can even more in reverse.