Read this excerpt from a science textbook and answer the question.

The ozone layer is very important. It prevents most kinds of ultraviolet light from making it to the earth's surface. However, it does allow through enough ultraviolet light to support the production of vitamin D in the human body. If the ozone layer did not exist, humans would be exposed to radiation that would destroy their skin. The hole in the ozone layer exposes humans to some harmful radiation. This radiation has been linked to an increase in skin cancer and cataracts.

The words "ozone layer," "skin cancer," and "cataracts" are bolded in the paragraph above because
A.
they are defined in the book's glossary.
B.
technical words are always bolded.
C.
a chapter is devoted to each term.
D.
they are foreign words or phrases.

Question

Read this excerpt from a science textbook and answer the question.

The ozone layer is very important. It prevents most kinds of ultraviolet light from making it to the earth's surface. However, it does allow through enough ultraviolet light to support the production of vitamin D in the human body. If the ozone layer did not exist, humans would be exposed to radiation that would destroy their skin. The hole in the ozone layer exposes humans to some harmful radiation. This radiation has been linked to an increase in skin cancer and cataracts.

The words "ozone layer," "skin cancer," and "cataracts" are bolded in the paragraph above because
 A. 
they are defined in the book's glossary.
 B. 
technical words are always bolded.
 C. 
a chapter is devoted to each term.
 D. 
they are foreign words or phrases.

aurora15 · Answer

can some one help me w this