Refer to the input text as context and select the correct relationship between 'PayPal' and 'credit card' from the available options.
Options: parent organization, subsidiary, currency, product/material produced

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.
product/material produced