Answer:
D.) "Leaders should do whatever is necessary to achieve their goals"
Machiavelli's book, "The Prince," is known for its advocacy of using ruthless and sometimes unethical means to maintain power and control. Machiavelli believed that leaders should do whatever it takes to achieve their goals, even if that means using deception, force, or cruelty. He argued that it is better for a leader to be feared than loved, and that a leader must be willing to act quickly and decisively to protect their position of authority. Therefore, the correct answer is d.