Correct Answer: (D) 'Crowds' and 'mobs' have no shared understanding of right and wrong.

Step 1 - What Marx and later scholars argued:

They rejected the view that crowds are irrational and destructive. They showed that the urban poor protested for good reasons and that their action had its own logic.

Step 2 - The key point about shared morality:

Marx held that crowds do share a common understanding of what is just and unjust. Their protest was based on a sense of moral outrage against deprivation, not on the absence of morals.

Step 3 - Locate the false statement:

Options (A), (B) and (C) correctly state his view. Option (D) says the opposite, so it is the one that is NOT true.

Hence, option (D) is the answer.