Delta is just the change in price of underlying relative to the change in price of option, and I don’t think it’s covered in L1 so don’t worry about option greeks for now.
But going back to your question:
A is the correct answer. Option prices are MORE volatile than price of underlying. Look at ohai’s explanation above (ignore the delta part if you don’t understand it, or google options delta)
Statement B is correct. Based on what we learn for L1, option price = intrinsic + time value. The further away you’re from expiration, the higher the time value -> higher option price.
I guess you can also think of it this way: the longer the time you have before expiration, the higher the chance that the stock can go in the money, so it will cost you more to buy that option; thus the higher option price. You’re making the problem way too complicated by going into interest rate volatility.
Statement C is correct (you already got this)
Since question is asking for statement that’s least correct, the answer is A

I hope my explanation makes sense lol.