Answer:
1a Bacteria/ Parasites
2a Alcohol Intake
Explanation:
1a Most Ulcers are caused by Bacteria or Helicobacter pylori
2a Alcohol Intake can raise the probability of developing a ulcer
Answer:
C
Explanation:
Synergistic interaction means that the effect of two chemicals taken together is greater than the sum of their separate effect at the same doses. An example is pesticide and fertilizer