Because its air we cant see it thats why its clear because it would be scary if we were able to see air! :)
The marketing mix is the set of controllable, tactical marketing tools that a company uses to produce a desired response from its target market. It consists of everything that a company can do to influence demand for its product. It is also a tool to help marketing planning and execution.
The answer is B: Some patients who have a poor hospital experience also have post-surgical complications.
This because this can't be a cause and effect because it's a survey study, and only 40% of the people who have poor hospital experience also have post-surgical complications.
Answer:
Could either be D or B but personally I think it is B