YOU SAID:

i went to the store and bought apples and oranges because why not?

INTO JAPANESE

私は店に行って、なぜリンゴとオレンジを買ったのですか？

BACK INTO ENGLISH

Why did I go to the store and buy apples and oranges?

INTO JAPANESE

なぜ私は店に行って、リンゴやオレンジを買ったのですか？

BACK INTO ENGLISH

Why did I go to the store and buy apples or oranges?

INTO JAPANESE

なぜ私は店に行ってリンゴやオレンジを買ったのですか？

BACK INTO ENGLISH

Why did I go to the store and buy apples or oranges?