The correct answer is A) oil barges. Pleasure craft are typically locked through a lock system separately from commercial barges, such as cement, coal, and sand barges, in order to maximize the capacity and efficiency of the lock. However, oil barges are often locked through with pleasure craft, as they pose a lower risk and can be accommodated more easily in the lock system. The other options (B, C, and D) are incorrect because cement, coal, and sand barges are commercial vessels that require separate locking procedures to ensure the maximum utilization of the lock's capacity.