Which is correct for pluralizing initials?

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Multiple Choice

Which is correct for pluralizing initials?

Explanation:
Pluralizing initials that form a recognizable word is done by treating them as a single unit and adding -s without an apostrophe. So the sequence ABC becomes AB C s, written as ABCs. This mirrors how we say “the ABCs of math” to mean the basics, and the form without an apostrophe is standard for plurals. Using an apostrophe (ABC's) signals possession, not a plural, and would feel off in modern usage here. Adding an extra letter to create ABCCs would be changing the base term and isn’t how you pluralize the original initials. So the correct form is ABCs.

Pluralizing initials that form a recognizable word is done by treating them as a single unit and adding -s without an apostrophe. So the sequence ABC becomes AB C s, written as ABCs. This mirrors how we say “the ABCs of math” to mean the basics, and the form without an apostrophe is standard for plurals.

Using an apostrophe (ABC's) signals possession, not a plural, and would feel off in modern usage here. Adding an extra letter to create ABCCs would be changing the base term and isn’t how you pluralize the original initials. So the correct form is ABCs.

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