You are creating a Web Form. You write the following code segment to create a SqlCommand object. SqlConnection conn = new.SqlConnection(connString); conn.Open（　）; SqlCommand cmd = conn.CreateCommand（　）; cmd.CommandText = “select cont(*) from Customers”; You need to display the number of customers in the Customers table. Which two code segments can you use to achieve this goal? （）

• A、object customerCount = cmd.ExecuteScalar();lblCompanyName.Text = customerCount.ToString();
• B、int customerCount = cmd.ExecuteNonQuery();lblCompanyName.Text = customerCount.ToString();
• C、SqlDataReader dr = cmd.ExecuteReader();dr.Read();lblCompanyName.Text = dr[0].ToString();
• D、SqlDataReader dr = cmd.ExecuteReader();dr.Read();lblCompanyName.Text = dr.ToString();