Worksheet Change Event Wrongly Trigger

Hi,

I am writing Worksheet Change Event to enable auto trigger to clear contents from column "SC" to "TB" if user clear contents column "B" to "I".However, there is a bit error whereby the sheet will be triggered even if user clear contents for only one column between "B" to "I"

Before this, i have used If Range("B" & i & ":I" & i) Is Empty Then but it does not work

For the beginner like me, I am a bit confused on the term If Not Intersect(Target, Range()) Is Nothing Then


Here is my code.

Private Sub Worksheet_Change(ByVal Target As Range)

i = ActiveCell.Row

    If Not Intersect(Target, Range("B" & i & ":I" & i)) Is Nothing Then
       Range("SC" & i).Resize(1, 26).ClearContents
    End If
 
End Sub

Then, my next confusion is should I choose Worksheet SelectionChange or Change as both seems to have the same output