nayana-c1.867c992ae9100904cc61c84591adf0f8f863e0387e30f0d0dbc86640e9f50a1a.en.train.337041

The task

What is the primary reason for avoiding methodologies like convolution theorem, finite difference method, and finite element method in this investigation? A. They were too expensive to implement. B. They were avoided due to inherent complexities and the need for extensive matrix manipulation steps. C. They were not accurate enough for the study. D. They were not available in the literature. Return only the single uppercase letter of the correct option.