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？（）
- 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>