She can hit whatever she wants range. She is not a strain range Vocalist ( mean that most female idols or soloists are strain high Note and singer . They only can hit in their support range). But not Minyoung. She's actually Vocalist. She knows how to output her voice clearly one note after note. In my opinion, she is Soprano support range, possibly higher. If she practices more, she probably can hit head voice or whistle note ( UpTo C6 or more ).