Answer:
The correct option is “The year 1866 was marked by a strange event” begins
Step-by-step explanation:
When adding a direct quote to a text, the first thing to remember is that when we open quotation marks, we need to close them.
As regards quotations and punctuation, if the punctuation refers to the quoted material, it should go inside quotation marks. If the punctuation refers to the whole sentence, then punctuation goes outside quotation marks.
In the example provided, the first option is the only correct one since it opens and closes with quotation marks and also because it does not include puntuation (comma) inside of it.