An attack on the us power grid by terrorists or a foreign power is indicative of:a. ddos attacks. b. espionage. c. cyberwarfare. d. extortion. e. phishing.

There are is no answer in the options

espionage have to do with obtaining political and military information

ddos also called denial of service is attacks on networks

phishing is the attempt to obtain sensitive information

while extortion is when terrorists or kidnappers take hostages and try to obtain money through threats