3. the invention of the transistor was important to the development of computers because it
a. decreased reliability.
b. increased the cost of computers.
c. increased calculating speed
d. increased the size of computers.

C

Explanation: Unlike the earlier electron tubes (often called vacuum tubes), transistors allowed the design of much smaller, more reliable computers—they also addressed the seemingly insatiable need for speed.

given the options, i would say your best bet is c. the modem supports up to 56 kbps, which is too low for video streaming. dial up modems use actual phone lines, which only can go up to 56 kbps as that's more than sufficient for traditional phone calls. this is also the reason why when a dial-up modem connects, you hear all those sounds. it's literally using the phone line to establish a connection.