Part b: what quotation from the essay directly supports the overall purpose in part a?

In order to answer this question, you must determine what the overall purpose of Part A is.  What is the central idea, or what is talked about the most?  This would be more of an opinionated statement that has supporting details within both Parts A and B.  Once you know that, you can then find a quote in Part B that supports what you choose as the overall purpose.

did you get the answer?

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.