Take context from the input text and decide on the accurate relationship between 'MasterCard' and 'credit card' from the options provided.
Options: developer, parent organization, subsidiary, product/material produced

Effective from 1 August 2015, cardholders of SAA Voyager Gold and platinum MasterCard credit cards within Ghana will benefit from annual credit card fee which USD28 and Voyager earn rate which 1 SAA Voyager mile for USD 1.50 spend respectively.
product/material produced