The answer is A haha give my credit
D to Db is a half step. Look at the keys B and C on the keyboard, there is no key in between them which means it is a half step. A whole step is two keys up (either black or white) therefore, D to Db would be a half step.
The children are being generous. They basically put a lot of effort into getting a present for Helen. And look! At the very beginning of the excerpt we can see that they are “delighted”; they are happy to be giving this present to Hellen!
