Exam CSCP topic 1 question 407 discussion

I go with B Pull based on retailers

The best approach for a firm producing goods with frequent customer design changes and selling to a few distributors who then sell to many retailers is D. Using a pull strategy to replenish the distributors. A pull strategy allows the firm to respond more flexibly to actual demand and design changes, ensuring that production aligns closely with current market needs A pull system requires a signal to drive replenishment. In this case, the signal would be good leaving the DC

In this situation, where there are frequent customer design changes, it would be best for the firm to use a pull strategy based on retailer sales. This means that the firm should produce goods based on actual demand from retailers, rather than replenishing distributors based on forecasts or push strategies

"subject to frequent customer design changes" it is PUSH not PULL

Why it isn’t D ?