Chelsea wants to build some birdhouses. She has a 12 foot board of wood. Each biedhous needs 3/4 foot of wood. How many bird house can Chelsea build?

A. 1/16 birdhouse
B. 1/9 birdhouse
C. 9 birhouses
D. 16 birdhouses

To find out how many birdhouses Chelsea can build, we need to divide the length of the board of wood by the length of wood needed for each birdhouse.

12 feet / 3/4 foot/birdhouse = 12 * (4/3) = 12 * 4/3 = 48/3 = 16 birdhouses.

So, Chelsea can build 16 birdhouses. The correct answer is D. 16 birdhouses.