Jan is the CEO of GlenOak Corp. After analyzing GlenOak's vision statement and aligning it with new environmental conditions, Jan rewrote GlenOak's mission. Which of the following best characterizes Jan's action?

a. Jan should have involved managers at all levels in the firm as well as employees who interact with customers and the markets for input when rewriting the mission statement.

b. Because a mission can change along with environmental circumstances, Jan did the right thing in rewriting the mission.

c. Because the CEO has the final responsibility for forming a firm's mission, it was proper for Jan to rewrite the mission statement.

d. A mission statement is an enduring reflection of the values and aspirations