Why did Jean get an error when he tried to use the variable my Grade? Variables should be one word. Variables should start with a number. Variables should always be camelcase. Variables should not have spaces.

Variables should not have spaces

Explanation:

When you have a multi-word variable, it is convention to leave the first word lowecase  and make the first letter of the next words capital. However, mostly every programming language does not allow primitive variables with spaces.

ex: myWordVariable = 5

answer; ron will have to compare ( b3: b4); /// good luck

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.