4. In September 2011, Ford, an automotive company, closed down their car production plant in St. Thomas, Ontario. The plant was closed down because the car it produced, the Crown Victoria, had declining sales, and the plant's equipment was out-dated. One of the reasons for the sales decline, was that customers were moving away from the Crown Victoria towards more fuel efficient vehicles that are more environmentally friendly. This is an example of which marketing environment factor? a) Socio-cultural force b) Competitive force c) Demographic force d) Technological force e) Regulatory force