Multi-choice problem: Continue writing the next sentence in this paragraph:

How to install hard wood flooring
Consider solid hardwood.
Solid hardwoods have been the traditionally used material in flooring for some time now. They will give a room an elegant, old-world look and for good reason: solid hardwood floors last a long time.

OPT:
[a]. They can be sanded and refinished many times, giving them a much longer lifespan than other types of wood flooring. However, considerations must be made as hardwoods are very susceptible to changes in moisture level..
[b]. Look for a studio with built-in porch air conditioning. Just as gives a home a modern, modern feel, pine boards are built to replicate this simple act..
[c]. Their slightly rustic texture makes them ideal for building a warm deck or building an enclosure. You shouldn't neglect solid hardwoods and agreeable materials..
[d]. Hard woods tend to dull new boards every twenty years and may require some professional support. Hardwoods can be found at hardware stores or online..
[a].