Which quote from the selection best demonstrates the author's preference for cork flooring?

a. After reading several reviews and having used it at home for several years, I highly recommend this option for anyone interested in eco-friendly flooring."

b. However, there are some pitfalls that keep buyers from investing in cork flooring. For one, it is expensive!

c. Because cork flooring does not trap allergens, pet dander, or dust, it is also great for allergy sufferers."

d. These trees are grown in the region around the Mediterranean Sea, and therefore, the cost of shipping bumps up the sticker price considerably."