Answer:
c. Specialization,
Step-by-step explanation:
Since in the question it is mentioned that she selling her product on the internet and she knows her father does not like the changes but she knows that it would be important for the company .
So here if she wants to improve the productivity of the product so she must practice in specialization as if the product is different from the competitor in terms of quality, price, quantity, attractiveness, etc so the chances of increasing the sales would be high
Hence, the option c is correct