17-19 please!

&. C. e. a. bill-of-materials 17. A visual depiction of the requirements in a bill of materials, where all components are listed by levels is a Waste of time b. Product Structure Tree Issue dependent upon the inverse of stock out risk d. Lot Sizing rule Lean Principle 18. Which of the following represents "Green Purchasing" in Supply Chain supplier selection? Buyers looking for recyclable material b. Buyers looking for brown environmental byproducts Buyers looking for biodegradable material d. re-evaluating outsourcing "a" and"c" 19. Which of the following is not a Financial measure of Supply Chain performance? Cash Flow (Cash to Cash) b. Cost of Goods Sold Total Revenue d. Shareholder's equity Operating Expenses c. e. a. c. e. 3