Please help me with the right option

When performing sales mix analysis, which one of the following is false: O a. Normally the calculation of the breakeven point for multiproduct is more complicated than that for a single product. O b. Shifting the sales mix to the product with a lower contribution margin will likely ncrease the overall contribution margin O c. Making changes to the sales mix will likely cause a change in the breakeven point O d. Producing and selling more units of the product with a higher contribution margin would likely decrease the breakeven point O e. The sales mix is usually assumed to be remain the same