Answer: The correct answer is: "Recent research has revealed that having a daughter, versus having a son, causes fathers to change their mind about traditional gender roles"
Step-by-step explanation:
Maybe this happens because fathers are more minded to do activities label as "boys' things" with their daughters than "girls' things" with their sons. For example, practicing sports (soccer, baseball, basketball, etc) The predisposition about what a girl should do might changes for the father who maybe feels more comfortable with his daughter playing soccer than with his son playing with dolls.