Take context from the input text and decide on the accurate relationship between 'Plug Power' and 'fuel cell' from the options provided.
Options: product/material produced, parent organization, distribution format, legal form

Following the Feb 2014 announcement that Plug Power will supply 1,738 GenDrive fuel cell units to Wal-Mart’s six North America distribution centers over the next two years, its shares catapulted 133.8% till almost mid March.
product/material produced