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?

Preventive transformations are a category of obfuscation techniques specifically designed to make it exceptionally difficult for automated de-obfuscation tools to analyze, understand, or reverse-engineer the original application. These transformations aim to break the assumptions or patterns that de-obfuscators typically rely upon, thereby increasing the effort required for reconstruction.

Data obfuscation focuses on making data structures and values difficult to understand or interpret, rather than directly preventing de-obfuscation tools from extracting the true application logic.

Control obfuscation modifies the control flow of a program, making it harder to follow the execution path, but it is a specific technique, not the overarching category for preventing de-obfuscation tools.

Layout obfuscation changes the syntactic appearance of the code, such as removing comments or renaming variables, but it does not inherently prevent de-obfuscation tools from extracting the core application logic.