Working with a Very Limited Budget, Professor Jenner Undertook a National

Working with a very limited budget, Professor Jenner undertook a national survey of 3,000 households. Jenner felt that the topic under investigation would produce a low response rate. What advice would you give Jenner?

A) Use postage stamps for both the outgoing and the return mail.
B) Use postage stamps for the outgoing mail and business reply permits for the return mail.
C) Use bulk rate for the outgoing mail and business reply for the return mail.
D) Use bulk rate for the outgoing mail and postage stamps for the return mail.
E) Use bulk rate for both the outgoing and the return mail.