Usage of c:remove tag

[Ranjani Theyagarajan]

Given that a scoped attribute cart exist only in a user's session,
which two taken independently, ensure the scoped attribute cart no longer exists(choose two)

a) ${cart=nll}
b) <c:remove var="cart" />
c) <c:remove var="${cart}" />
d) <c:remove var="cart" scope="session" />
e) <c:remove scope="session">cart</c:remove>
f) <c:remove var="${cart}" scope="session" />
g) <c:remove scope="session">${cart}</c:remove>

Answer B,D

But i think the appropriate answers is only D. Can anyone help
me solve this one?

[Patrick Williams]

B is correct provided that there is no cart attribute in page and request scopes. Given the literal interpretation of exam questions, I would have to agree that D is the only correct choice given the specific language of the question. When I have doubts about a question like this, I choose the correct answers first and then try to find the "best answer" to fill in the requirement of choosing 2. I came up with B and D without peeking at the answer first by using this technique. I hope that this helps.