Which code segment should you use for each text box?

You create a SQL Server 2008 Reporting Services (SSRS) report.
The report contains a table.
You need to ensure that alternate rows in the table have a pale green background.
Which code segment should you use for each text box?

A.
=iif(RowNumber(Nothing) / 2, “PaleGreen”, “White”)

B.
=iif(RowNumber(Nothing) Mod 2, “PaleGreen”, “White”)

C.
=iif(CountRows() / 2, “PaleGreen”, “White”)

D.
=iif(CountRows() Mod 2, “PaleGreen”, “White”)