Please submit your concern

Explanation:

Option 1 is incorrect. The passage states – “... the rarest materials for batteries would make undeserving despots and their dynasties fantastically rich.” Thus, option 1 is not an exception. Eliminate option 1. Option 2 is incorrect. The passage states that after electric cars, “The air in cities would once more be breathable and their streets as quiet as those of Venice.” Eliminate option 2.
Option 3 is incorrect. In the last paragraph, the author states that “Traffic jams will be abolished only when the private car becomes a public utility.” Eliminate option 3.
Option 4 is correct. The passage does not state anywhere that the economy itself will be undermined by electric cars. Retain option 4.
Hence, the correct answer is option 4.