Entrepreneurs have a dilemma of how to perform research and development (R&D) that will result in a high-quality, engineered as quickly and as inexpensively as possible with limited resources.

Entrepreneurs initially have very tough situation to understand, handle and flow of work to perform high quality research and development and in result of that produced prototype as quickly as possible with limited resources and at very low (minimum) cost.

Prototype is basically a early sample, device or model of product which is built to test it or test the process to perform original big product. So, prototype is generally designed and used to evaluate the precision by system users and analysts.

the answer is c.

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answer(b) keep oxygenated and deoxygenated blood separate;