Critical Reading- the answer is in the passage but I don't get the passage

Test Preparation SAT Preparation
15

<p>andyis, on the “comprised/is comprised of” issue: The standard usage of the word “comprise” is undergoing a change. In the standard usage for most of the 20th century, the whole comprises its parts. It is not comprised of its parts. For further discussion of this point, see:</p>

<p><a href=“Grammar Girl - Quick and Dirty Tips”>http://www.quickanddirtytips.com/education/grammar/comprise-versus-compose&lt;/a&gt;&lt;/p&gt;

<p>Grammar Girl claims that the phrase “is comprised of” is incorrect. “Comprise” probably comes from Latin, and the usage for most of the 20th century probably fits the Latin origin of the word.</p>

<p>However, the usage of comprise has definitely been changing. When I was a grad student, I wrote a sentence in which the whole was comprised of its parts, and my prof suggested changing it. Now, however, more people approve of “is comprised of” than disapprove of it.</p>

<p>My guess is that outside of practice tests, the SAT people are pretty careful to avoid questions about usage that is in flux. I wouldn’t worry about this one. </p>