An All-Or-None Order Is a Limit Order Either to Buy

An all-or-none order is a limit order either to buy or to sell a security in which the broker is directed to attempt to fill the entire amount of the order or none of it. An all-or-none order differs from a fill-or-kill order in that

A) with an all-or-none order immediate execution is not required.
B) with an all-or-none order immediate execution is required.
C) with an all-or-none order oversubscription is allowed-filling the order for more shares.
D) none of the above