Answer:
The correct answer is option <em>C) Because he made significant discoveries about electricity,</em>
Explanation:
There are serveral punctuation rules related to the use of commas.
In this case, when starting a sentence with a dependant clause, we use a comma after it.
Dependant clause in the sentence: <u>"Because he made significant discoveries about electricity,"</u>
The rest of the options use commas incorrectly (option A and B use a comma between a verb and an adjective, option D does not use comma after dependant clause)
