A study was conducted to determine the employees' cost of travel to the company's new location in the city. Based on a random sample of employees' travel costs, the 90% confidence interval for the mean amount spent over three months is ($540, $680).Which of the following is the correct interpretation?

a.

90% of all employees pay between $540 and $680 to commute to work.

b.

None of the suggested answers are correct

c.

One can be 90% sure that employees in this sample averaged between $540 and $680 to commute to work.

d.

One can be 90% sure that the average amount all employees pay for work travel is between $540 and $680.

e.

90% of the sampled employees pay between $540 and $680 to commute to work.