The Following Passage Contains an Argument with an Implicit Premise

The following passage contains an argument with an implicit premise and/or conclusion. Identify the best standard-form representation of the argument.
The passage:
People act like it's obvious that there are objective moral facts: that there are at least some things that are right or wrong independently of what anyone happens to think or feel about the matter.
Some simple reflection, however, shows this belief is false. If there's substantial disagreement about a topic even after it has been extensively discussed for millennia, then that's evidence that there are no objective facts about that topic. Given what we
Know about people's views of morality, it follows that there are no objective moral facts.

A) 1) Given what we know about people's views of morality, it follows that there are no objective moral facts.
2) If there's substantial disagreement about a topic even after it has been extensively discussed for millennia, then that's evidence that there are no objective facts about that topic.
So, there no objective moral facts.
B) 1) If there's substantial disagreement about a topic even after it has been discussed extensively for millennia, then that's evidence that there are no objective facts about that topic.
2) There is substantial disagreement about morality even after it has been discussed for millennia.
So, there are no objective moral facts.
C) 1) People act like it's obvious there are moral facts.
2) There are no objective moral facts.
So, if there's substantial disagreement about a topic even after it has been extensively discussed for millennia, then that's evidence that there are no objective facts about that topic.
D) 1) If there's substantial disagreement about a topic even after it has been discussed extensively for millennia, then that's evidence that there are no objective facts about that topic.
2) After extensive discussion for millennia, there is not substantial disagreement about morality.
So, there are no objective moral facts.