MLA style addresses citing sources, formatting and page layout and preparing a manuscript for publication.
MLA style is the reference method by Modern Language Association.
Addresses mean to mention.
Citing sources are the original source for an idea or information.
Formatting means appearance or presentation.
Manuscript is a document which is hand written.
Publication means a book or journal issued for sale.
Hence the correct options are (2), (3) and 6)
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