Which of the following statements adds the number stored in the decPrice variable to the number stored in the decSubtotal variable,and then assigns the result to the decSubtotal variable? 
Definitions:
Homicide-Suicide
An incident where an individual commits homicide and then takes their own life shortly afterwards.
Psychological Abnormality
A deviation from what is considered a normal range in mental state or behavior by societal standards, often indicating a potential mental disorder or illness.
Subculture of Violence Theory
A theory suggesting that violence is a learned form of behavior that is more prominent within certain groups or subcultures in society.
Interpersonal Problems
Issues arising from interactions between individuals that can lead to conflicts or disagreements.
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