Which sentence uses dashes correctly?
a.
now we will hike—along the ridge, down the hill, and across the creek.
b.
on the last page of my program is—the lead dancer's autograph.
c.
i want to hear everything, but—oh, someone is knocking on the door.
d.
this sweater—the one that turned up at the bottom of my closet, does not fit me anymore.

i remeber a bit, but i don't have the exact qoute.

it said that everytime you chopped a head off a new one grew in it's place.

explanation:

i decided to stay late in the laboratory to continue my experiment with the lightbulb. at midnight, thomas edison opened the door and saw all the stuff he was working on. the lightbulb, film and the transmitter. as he walks in an idea hits him on how the lightbulb would work. he would have to change a few wires around to get it to light up. when he did change the wires around it worked so he decided to write a telegraph to his friend to tell him about his success.   as he was packing up he grabbed the telegraph and walked to his home. he told his wife about the success and the next morning mailed the telegraph.