Pls i need this fast What quality assurance activity is a purchasing manager responsible for?

A. Inspecting the quality of goods received from a supplier

B. Ensuring that the product design process includes high-quality materials

C. Overseeing the daily operations of suppliers to ensure their compliance with quality standards

D. Responding to service calls from customers whose products have quality issues

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends > a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?