Which of the following is the best way to practice your secondary technology skills?

a. click the mouse as many times as you can.
b. type your notes while you are watching a video lecture, rather than writing them on paper.
c. practice typing web addresses so you won't have to copy and paste them.
d. open each program on your desktop.

Why were most movies from the late 1890s until the early 1930s only filmed in black and white? there were only a few people who could afford the technology to produce color motion pictures back then. audiences did not want color motion pictures until later. the film used to make color motion pictures often overheated, which was a safety hazard, so it was generally not allowed. color films had to be hand-colored, frame by frame.