Select the most appropriate option to fill in blank 4.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. massive.
The sentence describes a significant or extensive increase in cyberattacks. "Massive" effectively conveys the idea of a large-scale or dramatic rise in incidents.
"Massive" aligns with the context of describing a large and noteworthy increase, fitting the description of a substantial rise during the Covid pandemic.