Answer: d. all of abobe
Explanation: Hi, the answer is D.all of above.
There are many circumstances that can cause discolored teeth. Most of the time, the stains are “extrinsic,” affecting the tooth enamel alone.
An example of extrinsic discoloration is stains caused by foods or beverages. Black tea or coffee; wines, both red and white; and darkly colored foods such as beets or chocolate are prime culprits. Other foods likely to stain teeth are berries, popsicles, candies and pickles
