Would building North Carolina with twelve 14-inch guns affect American carriers?
Short answerNo significant carrier effect is expected; the likelier secondary change is to cruiser appearance or design harmonization.
NotesThere is no direct link between the North Carolina main battery and American aircraft-carrier development. Twelve 14-inch guns would give the battleship a heavier volume of fire without rewriting later carrier requirements. A subtler consequence might appear in cruiser design, because navies sometimes tried to make cruisers and capital ships resemble one another at distance. That design-family effect is more plausible than a chain of consequences across unrelated ship types.