________ monitors and tracks the emails of a particular user. This kind of tracking is possible through digitally time-stamped records that reveal the time and date when the target receives and opens a specific ________.

Which of the following terms describes the category of cloud computing in which a customer develops applications using development tools and infrastructure provided by the service provider?

A. Infrastructure as a service B. Software as a service C. Platform as a service D. Network as a service

In a heap, the tree is ____.

A. complete B. nearly complete C. not complete D. complete or nearly complete