Answer:
The correct answer is - d. Designing and building an artificial heart for the human circulatory system.
Step-by-step explanation:
Engineers have various types of the field according to their skill and knowledge, bioengineers are also one of them, who design biomedical equipment and devices, artificial organs, or technical help in the biological field such as Designing and building an artificial heart for the human circulatory system.
Thus, the correct answer would be d. Designing and building an artificial heart for the human circulatory system.