Which of the Following Would Be the Most Effective Option

Multiple Choice

Which of the following would be the most effective option for a user interface design?

A) avoiding the addition of unnecessary links or options especially when the user is engaged in a sequential task
B) making sure that users buy all the items kept in their shopping carts
C) mixing the design and layout for the website in order to keep a balance of all the available designs
D) letting users know in an indirect way when something on the website changes, or the user has completed an action