Which is FALSE concerning Cash Accounts held at a brokerage firm? At the time of a purchase the buyer must have sufficient funds in his account to make full payment They are intended for investors who wish to buy securities and to pay forthem with cash At the time of a sale (or at least before settlement date) the seller must have the security being sold, in his account Cash accounts are the most flexible type of account becuase they can be used for both cash trades and margin trades