"It should be a simple process for users to enter information and navigate between screens," is related to which guideline for the design of human-computer dialogues?

Online users posting on a class discussion board should ______.

a. skip proofreading posts since it is an informal setting b. start a new thread for new topics c. keep all topics under one or two threads d. make their posts as long as possible

The SQL command ________ adds one or more new columns to a table

A) create table B) alter table C) create view D) create relationship