Can someone write down the explanation for this, possible answers are given, thanks

Calculating operating leverage. Marvelous Corporation has a degree of cash flow operating leverage equal to 1.25. If the firm's EBITDA was $1,000 last year while its depreciation and amortization expense was $50 in the same year, then what was the firm's degree of accounting operating leverage?

1.26

1.35

1.30

1.32