後天下之樂而樂
Which one is correct?
a) 后天下之乐而乐
b) 後天下之樂而樂
c) 後天下之楽而楽
Do people usually recognize all variants as valid and legible? Or does any particular set of letters/symbols prevail in practice?
Take a lowercase a in English for example. This font writes it differently than a child. Or in cursive. Or probably than you would write it. But you recognize all of them and don’t really think about it.
b) Traditional Chinese
c) 楽 is a variation of 樂, which is now widely used in Japanese Kanji but deprecated in Traditional Chinese.
Note:
A variation means some people write 樂 as 楽 in ancient China, but not widely adopted.
Kanji is a Japanese word, means "Chinese Character".