Which sentence best shows that Mr. Caldwell is confused? “What!” said Mr. Caldwell.

“What,” said Mr. Caldwell.

“What?” said Mr. Caldwell.

“What,” said Mr. Caldwell?

The third one

Explanation:

The third one Mr. Caldwell is asking what is (depends)

In the others he should have continued with a question and when asking something or you are confused you always add a question mark

EX:

What is happening,

What is happening?

Answer to ex:

2nd one :)

can you copy and paste what selections you read? the answer is based off of that.

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.