How could I respond to this discussion post?

Here are the directions, I have to respond to my classmate post. I have already attached the picture of what they wrote.

IV: Healthy dieting DV: Risk of being diagnosed with cancer 2. Develop a null hypothesis. Cancer studies shows that if a person doesn't have a healthy diet they are at risk of being diagnosed with cancer 3. Does the scenario indicate a Directional or Non-Directional hypothesis? This scenario indicate directional hypothesis shows that if the right diet is taken place it will have a lower rate of a person having cancer 4. Based on the scenario, what type of hypothesis test is best? Provide rationale. Based on this scenario the best hypothesis test would be null testing. This testing would provide information of the healthy diets the prevent cancer diagnosed by other people. Cancer studies conclude healthy dieting prevents one's risk of being diagnosed with cancer. 1. Identify the IV and DV. 2. Develop a null hypothesis. 3. Does the scenario indicate a Directional or Non-Directional hypothesis? 4. Based on the scenario, what type of hypothesis test is best? Provide rationale