Jack runs a company and is constantly under pressure. when he went to the doctor recently, he was advised to engaged in aerobic exercises that would make his heart pump faster and therefore function more efficiently. which diesease was he most likely diagnosed with

I believe your answer is Hypertension. 
Hypertension can be caused by stress.
Hope i helped.

The main ideas because the other people

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