Although Mnemonics Can Be Helpful for Remembering a Small Number

Although mnemonics can be helpful for remembering a small number of specific items (like a grocery list) ,it does have some drawbacks.One such problem is that

A) using a mnemonic involves a trade-off with less attention spent looking for memory connections that can help you understand the material.
B) mnemonics work only when remembering up to seven items.
C) mnemonics are particularly difficult to remember when specific information is being tested.
D) the recall of all items by mnemonics is slow.