You are developing a Windows Forms application that contains a DataGridView control. The DataGridView capture the customer's name, address, and phone number. You have been asked to provide data validation in a DataGridView to prevent users from leaving the.. You need to ensure that users cannot tab out of the name field without entering data What should you do ?（）

• A、 Validate the name field in the CellValidating event. Set e.Cancel = true if the name field is
• B、 Validate the name field in the CellErrorTextChanged event. Get e.RowIndex if the name field ..
• C、 Validate the name field in the CellEnter event. Set the focus on the name field if the name ...
• D、 Validate the name field in the CancelRowEdit event. Set the focus on the name field if the name ...