b. to state the reason for the existence of a business
Explanation:
A mission statement is a statement which focuses on the definition of the organization. It defines the services provided by the organization, the description of the product and about the location of the organization. It tells about the purpose of the business and the goals which it would fulfill.
“The barometer of confidence soared.” and personifies confidence with the motion of soaring. This allows for the audience to comprehend that their confidence is strengthening and being lifted by comparing it to something relatable to human behavior.