Which of the following statements is true?

A shift in the sales mix from low$-$margin items to high$-$margin items will decrease total profits even though total sales increase.

II$.$ A shift in the sales mix from high$-$margin items to low$-$margin items can cause total profits to decrease even though total sales may increase.

III. A shift in the sales mix from products with high contribution margin ratios toward products with low contribution margin ratios will raise the break$-$even point for the company as a wh

Multiple Choice

$$ Statements I and III are true.

Statements II and III are true.

All of the statements are true.

None of the statements are true.