What is a socket?a. The combination of the source and destination IP address and source and destination Ethernet addressb. The combination of a source IP address and port number or destination IP address and port numberc. The combination of the source and destination sequence and acknowledgment numbersd. The combination of the source and destination sequence numbers and port numbers

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.