单选题Which retrieves the value associated with “foo” from within an HttpServlet？（）A String value = getServletConfig（ ）.getParameter（“foo”）；B String value = getServletContext（ ）.getAttribute（“foo”）；C Object value = getServletContext（ ）.getInitParameter（“foo”）；D String value = getServletContext（ ）.getInitParameter（“foo”）
单选题
Which retrieves the value associated with “foo” from within an HttpServlet？（）
A
String value = getServletConfig（ ）.getParameter（“foo”）；
B
String value = getServletContext（ ）.getAttribute（“foo”）；
C
Object value = getServletContext（ ）.getInitParameter（“foo”）；
D
String value = getServletContext（ ）.getInitParameter（“foo”）
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