B The number of words you read per minute
I'll explain it in my own words..
The main theme of the poem is what the poem is mostly about. It teaches you about the moral and the life lesson you can learn from the poem.
I had to walk home from school in a thunderstorm
A dependent clause cannot stand on its own. A clause means that it has a finite verb, meaning that there are no infinitives and participles/gerunds only, but a finite verb.
Having that in mind, the dependent clause here would be D. who works at that desk, which means that the rest of the sentence - <em>The woman is absent today </em>is independent.