Answer:
B) because expository means to explain or describe something
The crust of the Earth is made of tectonic plates.
The Internet is also preserving certain regional dialects, such as Southern English, that previously would have faded. This is because the Internet lets these dialect speakers write down their unique words and phrases. The Internet has spawned a language revolution, the likes of which have never been seen before.
Not sure what you mean? can you paste a picture of the table so we can see what you mean? that would help you and me find the answer