I believe that's false because the <span>simple predicate of a sentence is the main verb, so it tells you what is being done in the sentence not who it's about. </span>
"But, of course, a salesman must not jeer<span> at the customer."</span>
I believe the answer is <span>Even in that time, there was a lower, middle, and upper class of society.
</span>
Take a look at this part of the excerpt
. . . <span> that these things were all either too far above me or too far below me; that mine was the middle state, or what might be called the upper station of low life. . .
the character acknowledge that there is three classes in his current society, upper, middle , and lower and he currently belong to the middle classes.</span>
