Which of the following are true about a bid and asked price to exchange currency at a bank?

a. The difference between a banks bid and asked prices is their fee for exchanging currency

b. A bank will purchase currency at the “Bid Price” and sell at the “Asked Price”

c. A currency which is not traded very much will likely have a large bid/ask spread

i. A,B,C are true

ii. A and C only

iii. B and C only

iv. A and B only