Final answer:
The correct approach is to clarify the requirements or modify the specification to indicate what should be done when there is more than one larger value in the array, ensuring clear and unambiguous behavior of the search method.
Step-by-step explanation:
When writing a method to search an array for a value that is larger than a given item, the most professional approach would be to clarify the requirements. Therefore, option C, which suggests that the specification should be modified to indicate what should be done if there is more than one index of larger values, is the best choice. This ensures that the behavior of the method is clear and unambiguous to anyone using or maintaining the code in the future. If the specification cannot be changed, the method could be designed to return the index of the first occurrence of a larger value, and this behavior should be clearly documented in the method's description.