True or false
foreign key values can be null.

The head restraint should be adjusted so that it reaches a.the top of your ears b.the base of your skull c.the top of the head

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.

Match the file formats with the types of multimedia they can store