Rahul is a manager in the Marketing Department of Acadia Bear Hospitality, a mid-size chain of hotels primarily appealing to vacationers who are interested in nature. Rahul's goals for next year include the following: increasing revenue from guided tours by 20%, increasing the number of customers who visit Acadia Bear's Web site by 25%, and turning Acadia Bear customers into ambassadors for the Acadia Bear brand. Which of the following changes would most improve the list of yearly goals specified above? a) doubling the proposed percentage increases in revenue from guided tours and Web site visitors b) clarifying what is meant by an "ambassador for the Acadia Bear brand" c) including proposals for changing Acadia Bear's core mission d) specifying the decisions that Rahul should make each week in order to meet these goals