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多項選擇題

Given that a scoped attribute cart exists only in a user’s session, which two,taken independently,ensurethe scoped attribute cart no longer exists?()

A.${cart = null}
B.<c:remove var="cart" />
C.<c:remove var="${cart}" />
D.<c:remove var="cart" scope="session" />
E.<c:remove scope="session">cart</c:remove>

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