Answer:
Addiction and gum disease
Explanation:
I think the correct answer to this question is B. Respiratory Infection.
Answer: The method used would be a clinical study design.
Explanation:
The clinical study design - This can be defined as research studies which involve the formulation of trials and experiments. The clinical study design can be seen as observational studies in medical, clinical and other types of research involving human beings
No she will not get her period because although it is possible for the person to see bleeding through pregnancy this will not be due to their menstrual cycle hope this helps