Which type of site acts as a gateway to the web and offers an array of services including searching, email, shopping, news, and organized links to web resources?

You can use ________ programs to create family trees

Fill in the blank(s) with correct word

________ is any situational property to describe the end user's environment in terms of physical, temporal, social, task, economic, and technical characteristics.

A) Quality of experience (QoE) B) Best effort C) Contextual D) Perception