You are creating a Windows Forms application for a book retailer by using .Net Framework 3.5.You are creating a Windows form to allow users to maintain a list of books. You write the following code segment.<br /> <img src="https://nimg.ppkao.com/2018-08/zhoulian/2018080109585339646.jpg?sign=8166af8384c221c11b077c0fed7ed858&t=62d19cff" /><br /> The variables strTitle and strISBN are already initialized with the necessary values.<br /> <img src="https://nimg.ppkao.com/2018-08/zhoulian/201808010959125577.jpg?sign=180ca0ec14fd36833a69c04975e5010e&t=62d19cff" /><br /> Which code segment should you insert at line 07?()<br /> <img src="https://nimg.ppkao.com/2018-08/zhoulian/2018080109592374815.jpg?sign=3bacefc828e3338457945e2
A、A
B、B
C、C
D、D