Answer: 3) Multi-finality
Explanation:
Multi-finality principle defines people persisting various past experiences and history can display varying development outcomes.These past experiences can be of child abuse, death of near ones,exploitation etc.
According to the question, Karla is displaying multi-finality principle because she had suffered from avoidance from her mother as a child but the output of her development shows different results.
Other options are incorrect because equifinality, comorbidity principle and psychopathology aspect is not shown through Karla's development. Thus, the correct option is option(3).