"Father and mother, good night!"
Would you not use "and" here, or does one omit it in certain situations?
is correct, but currently not accepted. Reported.
Yes it's usually omitted in this situation, just as it can be in english: "mother, father, goodnight" or it can be "mother goodnight, father goodnight" (妈妈 晚安，爸爸 晚安) but you rarely hear "mother and father goodnight" (妈妈 和 爸爸，晚安)
Father and mother sounds like 父母 to me. I would have gotten it right if the English sentence had said dad and mom.
i wrote 爸爸也妈妈,晚安 and it was marked as wrong, despite being their example sentence the other way round literally three exercises earlier
Usually, I see 和 as and, 也 as also (I don't disagree with you, just providing a perspective)
Mine was exactly as the translation shows, just without the exclamation mark -_-