Which of the Following Statements Is True of Business Confidence

Which of the following statements is true of business confidence indices? 

A)  ​They show how sure actual managers are about future business growth. 
B)  ​They indicate how businesses have been performing over the previous year. 
C)  ​They show how confident customers are about companies they do business with. 
D)  ​They indicate general economic statistics over the previous year.