Answer:
Human behavior is a result of nature and nurture together .
Step-by-step explanation:
The sex of an individual is determined by the sex chromosomes whether the individual has XX or XY chromosomes. The female has XX chromosomes and male has XY chromosomes.
The human behavior and its morphological characteristics are influenced both by the genetics as well as by the environmental factors. The accident changes the sex of a twin because the environmental factors show they effect along wit the nature of the twins.
Thus, the correct answer is option (C).