What is the result？（）

单项选择题AJSPpageneedstoperformsomeoperationsbeforeservicingthefirstrequest.Wherecanthisbedone？（）

A. within a method called jspInit
B. within the page directive of the JSP page
C. within a scriptlet at the top of the JSP page
D. within the  XML element

多项选择题Which two successfully translate and result in a value of true？（）

A. ${true or false}
B. ${requestScope[foo][0] > 500}
C. ${requestScope[“foo”][1] = 420}
D. ${（requestScope[“foo”][0] lt 50） && （3 gt 2）