Which of the following types of obfuscation transformation increases the difficulty for a de-obfuscation tool so that it cannot extract the true application from the obfuscated version?

A.
Preventive transformation

B.
Data obfuscation

C.
Control obfuscation

D.
Layout obfuscation

Explanation:
Preventive transformation increases the difficulty for a de-obfuscation tool so that it
cannot extract the true application from the obfuscated version.