The correct answer is A. “what a gorgeous outfit you are wearing, Sandy!”
Explanation:
In this sentence, there are mainly three types of punctuation marks. The first one is the quotation marks (“”), also called inverted commas that are used to mark quotations or direct speech, it means the words said by someone, in this case, all the sentence should be in quotation mark as all the words belong to the direct speech of someone. The second punctuation is the comma (,) which is used to separate parts in a sentence in many cases as in the case of lists, also in dialogues and similar contexts the comma is used before or after the noun to make difference between the idea and the person this idea is directed to as in the case of “what a gorgeous outfit you are wearing, Sandy!”, in which the comma is placed before the noun (Sandy) to make a difference between Sandy and what is being said to her “what a gorgeous outfit you are wearing!". And the third punctuation sign is the exclamation mark (!) used at the end of sentence that represents a strong feeling (exclamation) or to show emphasis, considering the speaker seems to be surprised for the outfit of Sandy a quotation mark should be placed after the last word of the sentence (Sandy) and before the closing quotation mark.
