Jenny Johansson Sells Customized Buses Like the Ones Bands Use

Jenny Johansson sells customized buses like the ones bands use while on road tours. Her company has recently assigned her to a new territory in the Upper Midwest, and she is reevaluating the sales strategies she used in her old territory in New England.
-Which of the following would be an example of partnering?

A) selling a customized bus to the CEO of the bus manufacturer
B) renting customized buses to corporate customers through a car service agency that services corporations
C) using the same brand of paint on all the buses they customize
D) developing s standardized process to ensure the buses all receive the same steps, with differences within those steps
E) creating two or more identical customizations for the same customer