Analyze the relationship between 'MasterCard' and 'credit card' within the context of the input sentence.
Options: distribution format, developer, product/material produced, chief executive officer

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