Answer:
1.) either
2.) or
3.) all commas
Explanation:
Because the statement describes the desserts as something Marybeth "loves", it seems like she would want these things. Therefore, saying she does not want these desserts, which would be implied if neither and nor were used, would be incorrect. "Neither" and "nor" are used to describe things negatively, as not desired, or otherwise as not included. "Either" and "or" are more general, and are used to describe alternatives and choices. Remember, "either" always goes with "or", and "neither" always goes with "nor".
In terms of punctuation, commas are always used in dates. They are also used when separating terms in a list.
The correct sentence should be:
Marybeth would love either ice cream cake or apple pie for her celebration on March 13, 2018, but don’t forget she is allergic to nuts, pineapple, and gluten.
