The last one is punctuated correctly
A credit card is a card that you can use to purchase items with borrowed money from a credit agency. It's usually used to buy items with huge sums (because why would you keep anything more than $100 in your wallet on an average day?), so buying movie tickets and purchasing gasoline are things you're more likely to pay cash for. Computers are always expensive items and without knowing where the groceries are bought or how much they cost, we can assume there are situations where you might not have to pay a lot for groceries. So I believe it would probably be better to use a credit card for C. Purchasing a computer (unless you have a lot of groceries). Hope this helps!
An irony can be defined as an occurrence, event or state of affair that is contrary to what is normally expected. For the above question, the correct option is D. This is because, when the police brought Valjean the thief to the Bishop's house, one does not normally expect that the bishop will go ahead and give the thief the candlesticks that can be used together with the plates that the thief stole at first.