Which of the following statement are correct?
1. Development psychology is the study of changes in behavioural and mental processes through life.
2. In the longitudinal method of study people are followed through their life spans.
3. In cross-sectional method of study, representative group who are at different stages in development are compared.
4. Environment influence interacts with maturation to determine the final form of the behaviour.
Select the correct answer

A. 1 and 2

B. 1 and 4

C. 1, 2 and 3

D. All of these

Answer: Option C