For the factors listed below, note whether the cut-off grade would likely rise or fall and explain why. The first one (a) is an example (1.5 pt): a. Increased market price of the metal? Rise or Fall Explain: b. New beneficiation technologies? Rise or Fall Explain: c. Better (more equitable) labor agreements? Rise or Fall Explain: d. Rising energy costs? Rise or Fall Explain: e. More stringent environmental regulations? Rise or Fall Explain: 2) Many closed mines exist throughout the United States (and other countries). If the cut-off grade drops for ores once extracted from these legacy mines, what might happen to these old mines? (0.5 pt)