4. Hacer una pregunnta means to ask a question. It would be the best answer because entregar un informe means to give in a document which has nothing to do with it. Llegar tarde would just make it worse because you wouldn't want to be late. Contestar means answer but how can you answer something when you don't even understand so yeah A would be your best choice.
5. C would be your best answer because pensar is past tense. Pienso would be used if it was you who's thinking. Pense would be past tense too.
