Write the next sentence in the following story.

How to buy a used fishing boat
Decide what you're looking for in a fishing boat.
Prospective buyers have several things to consider when choosing a boat to purchase :
Size: fishing boats come in a wide variety of sizes, from watercraft you can store in your shed to mammoth vessels that require boathouses. Be sure you select a boat you can store appropriately, and don't overstretch your limits.

Available options: a). The dimensions: traditionally, boats are made of polyethylene. Polyethylene is actually a substrate.. b). Color: saltwater fishing trips and lakes require more modern-looking boats. Make sure you're serious about fishing.. c). Make sure your first choice of boat is in good condition. Boats that are in excellent condition should not be traded.. d). A poorly stored watercraft can suffer irreparable damage in harsh weather conditions. Cost: the larger the boat, the bigger the price tag... The answer should be
d).