Stress can reveal itself in many ways, including physical symptoms. which of the following might be a physical symptom of stress?

Skin stress eye stress from an injury or a disase

Blood transfusions were rarely done and often fatal; they were outlawed until the nineteenth century.

Bmust be the answer, as technically all organs move, so a is incorrect. all organs are made of different types of cells, so that isn’t a problem, so c is also incorrect. human hearts are very similar to many other animals’ hearts, so d is also incorrect, yet the heart is made of muscle, which is hard to grow in the lab so it would be correct to say b