Hi!
The answer would be D, because it is introducing the main idea of Edison and Electricity.
Hope this helps!
B. No. Well written papers should not require any revision after the first draft.
Since 'next' is a time-order word, you need another.
'Then' is a time-order word. You are not stating a 'fact', nothing happened abruptly, or 'suddenly', and you aren't comparing anything, 'similarly'.
Answer:
"I guess Coach Rossi thought I did really well because he asked me to pitch a few before the inning was up."
