单项选择题 Exhibit: You develop a Web control to manage credit card information. The Web control is shown in the exhibit. You register the control on the Web Form by using the following code segment. <%@ Register Assembly="CreditCardUserDetails" Namespace="CreditCardUserDetails" TagPrefix="cc1" %> You need to declare the control on the Web Form. Which code segment should you use?（）

单项选择题 Exhibit You create a Web Form for the acceptance of donations. Users type donation amounts by using a TextBox control named txtAmount. The donation amount must be between 10 dollars and 10,000 dollars. You add the following RequiredFieldValidator and RangeValidator. During testing you learn that when users fail to enter values before submitting the Web Form to the server, the message "Please enter a value" appears, as shown in the exhibit. You need to ensure that the message appears immediately following the txtAmount TextBox control without extra spaces. What should you do? （）

多项选择题 You write a logging function for a Web Form. You call the logging function from the Page_Unload event handler. You test the Web Form and notice that the Page_Unload event handler does not call the logging function. You need to ensure that the logging function is called. What are two possible ways to achieve this goal? （）