Cardiologists are the people who run EKG machines. I think that’s the answer
I’m between a and b but I’m not sure
Answer:
Persian-speaking scholars have been active in furthering knowledge in fields of science and technology, such as astronomy, chemistry, anatomy, biology, botany, cosmology, mathematics, engineering, and architecture. Ancient Sassanid Persia was home to some of the earliest universities and libraries of the ancient world.