The telephone, invented in 1876, converted acoustic sound to electric signals. however, the audio production industry began using the electrical recording system only in 1925. why was there a delay in using this technology in audio production?
the missing piece of technology that prevented the audio production industry from using the electrical recording system earlier was a device that could blank the electric signal. the device that made this possible was the blank

fill in the blank

a amplify
b codify
c transmit

a stylus
b diaphragm
c audion valve

Assume you need to test a function named inorder. the function inorder receives three int arguments and returns true if and only if the arguments are in non-decreasing order: that is, the second argument is not < the first and the third is not < the second. write the definition of driver function testinorder whose job it is to determine whether inorder is correct. so testinorder returns true if inorder is correct and returns false otherwise. for the purposes of this exercise, assume inorder is an expensive function call, so call it as few times as possible!