Answer: Option c and d
Explanation: In simple words, prescriptive role refers to the role under which the manager identifies what should be done rather than stating what is done. In other words, under thus role the manager specifies duties and tasks that should be performed to achieve the objectives.
In the given case, Caroline is researching and recommending the actions that should be taken for maximizing the profit.
Hence from the above we can conclude that Caroline is performing prescriptive role.