Write the next sentence in this paragraph:

How to attract eastern bluebirds
Choose high quality nesting boxes.
Providing a secure nesting location is one of the best ways to attract bluebirds to your property. Whether you purchase or build your nesting boxes, its important to make sure that they are good quality so they will last a long time.

Choose from: (A). They should be constructed of rot-resistant wood, such as cedar. They should be easy to open for cleaning at the end of the season.. (B). Buy cedar or wood box durability boxes for better insulation, longevity, and durability. Use wire or nylon wire so they do not get damaged during winter.. (C). When installing them, make sure they do not come into direct direct sunlight, which increases the likelihood of yellow-nosing birds in your area. Pick a box with an angled roof to make it easy for birds to climb.. (D). The best location to build nesting boxes is somewhere that cannot be broken up into chunks. The best possible nesting locations are around or under trees or bushes that grow in a dense area of a forest..
(A).