Take context from the input text and decide on the accurate relationship between 'MasterCard' and 'credit card' from the options provided.
Options: currency, member of, product/material produced, director/manager

When a consumer pays for a sweater at a department store with a credit card, three parties usually get involved: money moves from the bank that issues the consumer's credit card through a network like Visa or MasterCard to the bank that processes transactions for the retailer.
product/material produced