Answer- C ( it enhances the portability of the front end of the compiler )
Using an abstract machine model for intermediate code generation enables the front end of the compiler to be more portable across different hardware platforms, as it can produce intermediate code that can later be translated into machine code for various target architectures.
When compilers generate intermediate code based on an abstract machine model, they create a representation of the program's logic that is independent of the target hardware architecture. This means that the intermediate code is designed to work on a hypothetical machine, abstracting away specific hardware details.
This abstraction enhances the portability of the compiler's front end because it allows the front end to focus on translating high-level language constructs into the intermediate code without worrying about the intricacies of different hardware platforms. Once the front end generates the intermediate code, the back end of the compiler can then translate this intermediate code into machine code tailored to the specific target architecture.