Nike Air Shoes Were Discovered to Have a Greenhouse Gas

Nike Air shoes were discovered to have a greenhouse gas in the heel air pocket.The company did not change the design _______________.

A) Until some environmental groups found out and complained
B) Since it did not have to change under the law
C) Because engineers were working on more profitable designs
D) Until it spent millions of dollars and many years to get a good new design
E) A and D