Shakespeare left it unclear, probably on purpose. They, themselves loyal to Pompei, are simply witnesses of the public's change of loyalty. They are also there to notice the crowd's frail affections. There is only one more mentioning of the two of them, later on in Act I, Scene 2, when Casca informs Cassius and Brutus that they have been "put to silence". It probably means they were killed or arrested.
The option that correctly combines the two sentences is option B. The assignment was originally due on Tuesday; however, the instructor changed to due date to Thursday. We can easily combine the two sentences with the use of the punctuation mark semicolon. This is used to indicate that there are two independent clauses in one sentence.
Your answer: "<span>pumice, a glass that comes from lava, is used for grinding and polishing materials".
This would be your correct answer, mainly because, after noting down a comma, we would (NOT) want to rephrase the topic, or even to restate the topic as well. And based on this, if we have noticed in our options, the first one, this sentence does not restate the topic after noting the comma.
Your answer: "</span><span>pumice, a glass that comes from lava, is used for grinding and polishing materials".</span>
It forces the listener to accept there is not one expected answer. It makes the sermon seem directed at the listener personally.It makes the listener think about their actions.