FRANKFURT (Reuters) - Swedish carmaker Volvo is preparing a hardware retrofit for some of its older diesel cars in Germany, according to a report by Der Spiegel magazine published on Monday. Volvo is working on the retrofit with catalyst producer Dr. Pley, which is based in Bamberg, Germany, it added.

Based on that paragraph can we conclude that this sentence is true?
Dr. Pley designed many of Volvo's older diesel cars in Bamberg, Germany.

Available choices: a). Yes; b). It's impossible to say; c). No;
b).