- "A, B or C"
- "A, B, or C"
- "A or B or C"
When there are three options: 1, 2, 3, where A, B, C are nouns or noun phrases, I'm wondering which is the best writing style.
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Sign up to join this communityWhen there are three options: 1, 2, 3, where A, B, C are nouns or noun phrases, I'm wondering which is the best writing style.
The first two versions of the list are functionally identical. The only real difference is the absence and presence of the Oxford comma. The use (or omission) of the comma before or (or and) in lists is contentious, and the question linked by user3169 explains it well. For most English writers it boils down to a question of what they were taught to do as small children, or perhaps by an influential teacher at some other point in their lives. There are pros and cons to either usage, but the intended meaning is the same.
The part of your question that isn't answered in the linked page is the difference between options 1 and 2 versus option 3. The inclusion of the word or twice is sometimes used for emphasis.
Suppose I asked you to choose among A, B, and C (I was taught to use the comma by Mrs. Clark in 2nd grade. :) ) and you were struggling to make a single choice. I might repeat my question, including both articles and putting particular emphasis on the word or. Adding that emphasis and repeating the word would demonstrate that you should choose one and only one option. To be clear, this is not a particularly formal style of writing, but it is good for spoken English if you really need to make your point about this sort of thing.
You can choose A or B or C.
From Harry Potter (book 1):
"Students may bring an owl OR a cat OR a toad."
The repetition and capitalization make it clear that students are allowed to bring at most one pet from the list.
The first one looks like there are only two options
Option #1: A; Option #2: B or C
The second one seems to be a better choice. It has three options
Option #1: A; Option #2: B; and Option #3: C
The last one is the same as the second one but not a preferable style (as you are asking). I mean I've encountered this style less frequently.