If an application contains the 0ption Strict On statement, which of the following can be used to declare the Rate named constant? a. Const Rate As Decimal = 0.09 b. Const Rate As Decimal = Convert.ToDecimal (0.09) c. Const Rate As Decimal = 0.09D d. both b and c Which of the following statements adds the number 10.75 to the contents of the price variable? a. price += 10.75 b. price =+ 10.75 c. 10.75 += price d. both a and c Which of the following sends the focus to the test1TextBox? a. test1TextBox.Focus() b. test1TextBox.SendFocus() c. test1TextBox.SetFocus() d. SetFocus(test1TextBox)