Final answer:
The coach should recommend that the client see a medical provider for a professional evaluation of the ankle injury, as symptoms suggest it may be more serious than a minor sprain.
Step-by-step explanation:
Given the symptoms described by the client with the ankle injury, the most appropriate recommendation from the coach would be to see a medical provider to get it checked out. Although the RICE technique (Rest, Ice, Compression, and Elevation) is a standard first-aid treatment for minor sprains, the client's inability to walk without pain and the presence of bruising suggest a more serious condition that may require professional evaluation. The medical provider can then determine if there has been a more severe injury such as ligament tears or bone fractures, which could necessitate different treatments, possibly including surgery or a structured physical therapy plan.