What does "penetrate" mean?

[Timathy]

Business English Lesson, Advanced Level

ESL/EFL Test #565 "Cyber-criminals and Cyber-crime", question 3

Cyber-criminals, along with the cyber-crimes that they ........., are constantly evolving, and our approaches and methods must also change in order to guard our company from this new wave.

(a) penetrate
(b) permeate
(c) perpetrate
(d) perpetuate

Business English Lesson, Advanced Level

ESL/EFL Test #565 "Cyber-criminals and Cyber-crime", answer 3

Cyber-criminals, along with the cyber-crimes that they perpetrate, are constantly evolving, and our approaches and methods must also change in order to guard our company from this new wave.

Correct answer: (c) perpetrate
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what does "penetrate" mean?

Timathy

[Mister Micawber]

Don't you have a DICTIONARY?
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Native English teacher at Mister Micawber's