which two, taken independently, ensure the scoped attribute cart no longer exists?

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

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>

F.
<c:remove var=”${cart}” scope=”session” />

G.
<c:remove scope=”session”>${cart}</c:remove>

Explanation: