A is a run-on sentence, therefore it is incorrect.
B (leave as is) in incorrect because the original sentence combines independent and dependent clauses with a semicolon; semicolons are used to combine independent clauses.
C is incorrect for the same reason B is incorrect (the first clause in dependent).
D is the correct answer, as it properly uses commas to combine the clauses.
Hope this helps.
What was Naismith's most important consideration in creating the game of basketball?
Answer: Out of all the options presented above the one that best represents what was Mr. Naismith's most important consideration in creating the game of basketball is answer choice C) The use of athletic skill. The reason being that he decided to invent a game of skill, finesse and accuracy, rather than one that relied on pure strength.
I hope it helps, Regards.
