Certkiller is outsourcing some content development tasks. The contractors who work on these projects will see some of Certkiller ‘s proprietary content before it is available to customers. Certkiller needs to ensure that this trade-secret content is kept confidential by the contractors who see it. Which of the following protects your intellectual property in this situation?

A.
Copyright

B.
Trademark

C.
License agreement

D.
Non-disclosure agreement