I believe it's either A or B. some types of cancer works the same, too, having mild symptoms shown.
Answer:
Cross-sequential.
Explanation:
Cross sequential study may be defined as a type of research method that are used by combining the cross sectional design and longitudinal design. This aim is to minimize the problems.
As Dr. Austin studies the effects of aging on memory. The doctor needs long time to study this effect. The one factor can be taken as longitudinal design and other as cross sectional design. This signifies that the doctor has used the cross sequential based research method.
Thus, the answer is cross- sequential.
Even the question is falsifying information. You should decrease sugar intake. Decreasing fat intake will not take off any weight.
