Final answer:
Based on the reasoning, the best course of action would be to accept the risk of breaking the smartphone screen.
Step-by-step explanation:
Based on the reasoning that the severity of risk in breaking a smartphone screen is low and the frequency of the risk event occurring is high, the best course of action would be to c) Accept the risk. Purchasing insurance for the smartphone would be unnecessary as the risk is low, and avoiding using the smartphone or hiring a personal assistant just to handle the smartphone would be excessive measures. Accepting the risk means acknowledging that the risk event may occur, but it is not significant enough to warrant taking any additional actions.