4.5 pts Question 11 At a sales level of $100,000, a firm has a degree of operating leverage of 10. This tells us that: if sales volume rises by 10%, operating income will fall by 100% if sales volume falls by 10%, operating income will fall by 1% olt sales volume falls by 10%, operating income will fall by 10% if sales volume falls by 1%, operating income will fall by 1% if sales volume falls by 1%, operating intome will fall by 10%