Read the excerpt from "Music Gets Personal.” Walking down the street, you still had to whistle, though. Old radios and record players were too big to carry. Radios had large tubes in them. Those tubes made the sound louder, but they were heavy. Parts of record players were made of iron. They were also too heavy to carry. Even if you could carry a record player, you couldn’t play it. Record players work only when they’re still.

Which details are included to explain the challenges of transporting music? Check all that apply.

People enjoyed whistling.
Radios were too big to carry.
Radios contained heavy tubes.
Some people could lift record players.
Record players had to remain still to work.

Read the quote from zimmermann in the code book. a future government could inherit a technology infrastructure that's optimized for surveillance, where they can watch the movements of their political opposition, every financial transaction, every communication, every bit of e-mail, every phone call. everything could be filtered and scanned and automatically recognized by voice recognition technology and transcribed. it's time for cryptography to step out of the shadows of spies and the military, and step into the sunshine and be embraced by the rest of us. which question does this paragraph answer? why does zimmermann think encryption is important? what kind of encryption did zimmermann invent? how does zimmermann’s encryption work? who made encryption based on zimmermann’s work?