Which cyberattack carries the most serious threat?

Question

A phishing attack on a chain store compromises customer data.
A malware attack shuts down the power plants in a large city.
Hackers launch a malicious code that shuts down Facebook.
A Trojan horse virus targets computers at all public libraries.

I think it’s c??

Answer 1

Huh? Is Facebook more important than power plants??

Answer 2

No

Answer 3

I meant b

Answer 4

Yes, it's b.

Answer 5

B is correct:)

Answer 6

B is the correct answer