What is the writer's view in the reading passage He believes that ______.

A．managers need a degree and the ability to communicate
B．training needs to be done in groups to be successful
C．managers today must have good communication and leadership skills
D．industrial managers do not need to write letters

A．They know how a tumor is developed.
B．They know how a new tumor is seeded in the body.
C．They know how the female hormone estrogen makes breast cancer cells grow.
D．They know breast cancer is a death sentence to women.