According to Fred Davis' model on the use of new systems, users' intentions regarding the use of new systems are a direct result of which factors?

A. Perceived usefulness of the new system; Perceived ease of use of the new system.

B. How much experience the user has with technology; Social pressures to use certain technologies.

C. Whether use of the new system is voluntary or mandatory; How easy the new system is to use.

D. The gender of the user; How much the new system helps the user complete work-related tasks.