Electronic funds transfer (a) involves making and receiving pay- ments via computers and other automated means (b) is the amount of demand deposits held at banks (c) is a payment procedure in- volving the use of checks (d) involves the transfer of funds from the Federal Reserve to member banks.

bibliography and citations to credit the sources hope this you if not my deepest of apologize ^w^

question as stated in comment

why did the chinese require the portuguese to pay for goods in gold and silver when trading?

choices

portuguese goods were less valuable than chinese goods.

the chinese already had a surplus of portuguese goods.

the imperial government wanted to stockpile gold and silver.

portuguese and chinese currencies were not exchangeable.

this a history q n in ancient time, theres no money exchange. so ans is portuguese and chinese currencies were not exchangeable.