Which of the following is an example of greenwashing?
a. a company markets a product made from recycled glass bottles.
b. a company charges more for a hybrid car than for a similar gas model.
c. a company donates money to a school reading project so it can advertise itself as environmentally friendly.
d. the smiths installed energy-saving lightbulbs in their rental apartment buildings.
e. the corner laundromat stocks only phosphate-free detergent in its vending machines