Final answer:
This is an engineering question, specifically related to aero engines. The correct thrust distribution in a high-bypass turbofan engine is typically Core: 10-30% and Fan: 70-90%, making none of the given options accurate, though option A is nearest to the expected values.
Step-by-step explanation:
The question asks about the thrust distribution in a turbofan engine between the core engine and the fan. The core is responsible for a smaller percentage of the thrust compared to the fan in modern high-bypass turbofan engines. These engines are designed to achieve efficient thrust by bypassing a significant portion of the air around the core. The typical approximate thrust distribution is Core: 10-30% and Fan: 70-90%. Therefore, none of the options (A, B, C, D) provided is completely accurate, but option A would be the closest with Core: 40%, Fan: 60% as it reflects a higher thrust contribution from the fan, which is a characteristic of high-bypass turbofan engines.