Help and please highlight which letter the answer is

Given a constant sales price, the larger the contribution margin, the: Select one: A. Lower the fixed costs as a percentage of the sales price. B. Higher the variable cost per unit as a percentage of the sales price. C. Lower the gross profit per unit sold. D. Higher the cash break-even point. E. Lower the financial break-even point. Clear my choice What is the internal rate of return on an investment with the following cash flows? Select one: A. 6.87% B. 6.33% C. 6.75% D. 7.67% E. 7.50%