Square’s business model is also deployed by late-arriving rivals PayPal Holdings Inc. PYPL, -1.65% and Intuit Inc. INTU, -1.58% both of which now offer credit card readers for mobile devices.
Take context from the input text and decide on the accurate relationship between 'PayPal' and 'credit card' from the options provided.
Options: subsidiary, parent organization, currency, product/material produced