Utilize the input text as a context reference, choose the right relationship between 'MasterCard' and 'credit card' from the options.
Options: chief executive officer, distribution format, developer, product/material produced

Samuel Ashitey said the MasterCard network in over 220 million shops and businesses in over 210 countries, the SAA Voyager credit card is by far the fastest way to earn miles with a ticket purchase to fly on South Africa Airways or make qualified merchant purchase.
product/material produced