Katrina works at a shopping center as a customer service representative. She’s talking to a group about a new service the shopping center has launched. Which statement shows that Katrina is aware of the appropriate tone of voice to use in meetings?

A.
“I hope you appreciate all the work we put in to develop this service.”
B.
“Try out our service for a month, and then decide.”
C.
“You’ll never get this opportunity again, so hurry up and decide.”
D.
“If you're smart, you won't hesitate to buy it now.”