Answer:
a. 1 and 3.
Step-by-step explanation:
Given that the operating leverage of a business firm is a sum of its fixed cost and variable cost about the way the firm's cost of business is attributed.
In this case, when a business firm has a high fixed cost, it normally requires a high number of sales to earn more profits. This is termed as "higher operating leverage." This thereby leads such business firms to have "increased risk."
Hence, It is practically correct that in business operation that when a business firm has Higher fixed costs it is associated with "higher operating leverage and increased risk"