highlight row on one sheet if name in column matches on another sheet within same workbook

Hello, I have a spreadsheet with multiple tabs. I am trying to figure out how to get a row to highlight on the tab called "Directory" if the Surname and First name (column A and B) matches the Surname and First name (Column A and B) on another tab labelled MC. Any assistance would be greatly appreciated

Hello everyone...we have determined that instead of having to match both column A & B we can just use column C as it is a unique number for each person. That said, does anyone know if it is possible to check column C on both sheets (Directory and MC) and highlight the row on the Directory tab if it is on both sheets?

Hello, I have had help obtaining some coding to highlight the row red if I run a macro, but it doesn't seem to be working. If I paste the coding on the "Directory" sheet and then run the macro "RunMe", nothing happens. If I paste the coding on the MC sheet instead, every row highlights regardless of whether or not it is a match. Here is the coding I am using:
Sub RunMe()
Dim lRow As Integer

Sheets("Directory").Activate
lRow = Range("C" & Rows.Count).End(xlUp).Row

For Each cell In Range("C2:C" & lRow)
If cell.Value = Sheets("MC").Cells(cell.Row, "C") Then
Rows(cell.Row).Interior.ColorIndex = 3
End If
Next cell

End Sub

Can anyone see what I am doing wrong?

the correct coding is:
Sub RunMe()
Dim lRow1, lRow2, x As Integer

lRow2 = Sheets("MC").Range("C" & Rows.Count).End(xlUp).Row
Sheets("Directory").Activate
lRow1 = Range("C" & Rows.Count).End(xlUp).Row
x = 1

For Each cell In Range("C2:C" & lRow1)
Do
x = x + 1
If cell.Value = Sheets("MC").Cells(x, "C") Then
Rows(cell.Row).Interior.ColorIndex = 3
End If
Loop Until x = lRow2
x = 1
Next cell

End Sub