QUESTION 17 Which of the following factors describes a possible cause for an unfavorable materials price variance? O a. Purchasing low quality materials Ob. Last minute purchases OC. Making a long-term commitment with one vendor for a specific raw material Od. Vendors flooding the marketplace with their products QUESTION 18 Which of the following types of standards can be achieved only under perfect conditions? O a. Tight but attainable standard Ob. Easily attainable standard O c. Currently attainable standard O d. Ideal standard