Which of the following is NOT one of the reasons that a company's strategy evolves over time? The need to respond to important technological breakthroughs and/or the fresh moves of competitors When the present strategy is clearly failing, perhaps because market conditions or buyer preferences suddenly change dramatically The need to keep strategy in step with changing market conditions, advancing technology, and/or newly emerging market opportunities Ongoing management efforts to fine-tune this or that piece of the strategy and to adjust certain strategy elements in response to new learning and unfolding events The deliberately planned efforts of company managers to make frequent strategy adjustments that will surprise rivals and keep them busily engaged in defending against its latest moves in the marketplace. A portion of a company's strategy is always developed on the fly because any time the market leader's strategy changes, a company has to quickly try to imitate as many of these changes as is feasible. managers must always be willing to supplement or modify various proactive strategy elements with as-needed reactions to unanticipated happenings in the surrounding environment. a company must do everything possible (in the way of price, quality, service, warranties, advertising, and so on) to clearly differentiate the company's product/service from the product/service offerings of rivals. company strategies have a short life and frequent strategy changes are normal and customary to keep the strategy fresh and in step with shifting competitive conditions. regular fine-tuning of a company's strategy is essential to achieving a sustainable competitive advantage over rivals