Which of the Following Is the Most Effective Strategy for Conducting

Which of the following is the most effective strategy for conducting an opt-in e-mail marketing campaign?

A) Create an executable ActiveX application as an e-mail attachment that describes the company.
B) Send e-mail messages once a day to initial contacts for the first two weeks.
C) Create an executable Java application as an e-mail attachment that describes the company.
D) Send e-mail messages once every two weeks to follow up on an initial contact.