Aresearcher is interested in conducting a study to determine whether people who experienced a devastating event, such as a house fire where the family lost everything, suffer lasting effects from such devastation early in life. this researcher is interested in the development of the subject(s).

a) personality
b) social
c) cognitive
d) physical

c) cognitive                                                      

Explanation:

Cognitive development: The term cognitive development refers to the process through which a child explore, think, and figure out different things in life.

When a child is being cognitively developed then it means that the child has developed problem-solving techniques, skills, dispositions, knowledge, memory, reasoning, intelligence, and language development that helps a child in understanding the world around them.

Cognitive development also includes the brain development of a child.

In the question above, the researcher is interested in the cognitive development of the subject(s).

its a hope it good luck