billy has requested his broker invest 400k into the list of investment vehicles listed here with their respective return rates. however he has some specific instructions that he would like to have them follow. His goal is to maximize his ROI given these requiements.

return rates

x1= 2.5%

x2= 5.7%

x3= 3.7%!

x4=7.7%

x5= 12.8%

In formulating the equations in a linear programming problem:

Which of the following would be the most appropriate constraint in the linear programming problem?

A) O.0.25X1 +0.057X2 +0.037X3 +0.077X4 +0.12X5 400000 B) 2.5X1 +5.7x2 + 3.7X3 + 7.7X4 + 12.8x5 2 400000 C) X1 + x2 + x3 + x4 + X5 - 400000 D) X1 + X2 + x3 + x4 + XS S 400000 E).25X1 + 57X3 = 40000