Final answer:
Implementing a collision detection algorithm would help alleviate network congestion due to collisions in a college.
Step-by-step explanation:
The solution that would help a college alleviate network congestion due to collisions is implementing a collision detection algorithm (option D). A collision detection algorithm is designed to detect and resolve collisions that occur when two or more devices on a network try to transmit data at the same time. By implementing this algorithm, the college can minimize network collisions and improve network efficiency.