B). They asked me what I wanted, and I finally said, "I don't know!"
Explanation:
The second option is correctly punctuated as it employs the comma(,), the exclamation mark(!), and the inverted commas("...") aptly. As per the rule, <u>the reported words like 'they asked me what I wanted...said' are not written inside the inverted commas but the exact words "I don't know!" are. The other punctuation marks like a full stop, exclamation marks, etc. are put inside the inverted commas</u>. Thus, <u>option B</u> is the correct answer.
