Write the next sentence in this paragraph:

How to age wood floors
Study how wood changes over time.
Go to a historic building that has wood flooring and study how the floors have aged over time. When you age hardwood flooring, you want to copy from real aged floors.

Pick from:
A). You want to choose the best wood for your floors, as you want to create a lasting impact and an attractive pattern. Hickory and beech have a great impact, as they're often used as floor mats.
B). This way, you'll have an idea of how old you want your finished floor to be. Look at wooden floors from a diverse perspective.
C). Begin by hand scraping the wood with a wood floor-scraping tool. Hand scraping takes time, but it will age hardwood flooring.
D). This is usually done by throwing a pencil around and scratching your sandpaper along the grain. If you're trying to replicate surroundings from a real-world era, try looking for traditional wood flooring.
C).