Upon receiving an urgent call from a customer, a technician determines that an onsite visit is required. The technician promises the customer that a co-worker will be onsite later because the technician does not want the customer to become upset. After checking, the technician realizes that the co-worker cannot visit the site. Which of the following actions by the technician would avoid a similar situation in the future?

A.
Tell the customer that all appointments are tentative.

B.
Check with a co-worker before making commitments for the co-workers schedule.

C.
Ask a supervisor to send the co-worker to visit the site as promised.

D.
Avoid making promises to customers.