Answer:The answer to your question is letter BStep-by-step explanation:Product (6m² - 5m + 4) ( -4m² - 3m - 7)1.- Multiply -4m² by each term of the first group ( 6m² - 5m + 4)(-4m²) = -24m⁴ + 20m³ - 16 m²2.- Multiply -3m by each term of the first group (6m² - 5m + 4) (-3m) = -18m³ + 15m² - 12m3.- Multiply -7 by by each term of the first group (6m² - 5m + 4) (-7) = -42m² + 35m - 28 4.- Simplify -24m⁴ + 20m³ - 16 m² -18m³ + 15m² - 12m -42m² + 35m - 28 -24m⁴ + 2m³ - 43m² + 23m - 28