Patty Paralegal's Job Requires Her to Call All 250 of the Firm's

Patty Paralegal's job requires her to call all 250 of the firm's corporate clients twice each year and give them some information. Most of these telephone calls take less than 2 minutes, especially if she can just leave a voicemail. The smallest billable amount at Patty's law firm is .1 or 6 minutes. If Patty makes 30 phone calls per hour, but bills them at 6 minutes, Patty's one hour becomes 3 hours. Therefore, at the end of an 8 hour day, Patty can bill 24 hours! Patty should

A) ask her supervising lawyer for permission to not bill clients for this service but ensure that the time she spends at this task is added to her annual cumulative billable hours.
B) bill each call at a full hour because no one is going to know.
C) ask her supervising lawyer for permission to just not bill clients for this service.
D) bill each call at 2 minutes and let the accounting department deal with it.