Amani Ltd is intending to invest in four independent projects. The following information relates to the projects:

Notes:

$($i$)$The company has a capital limitation of Sh$\mathrm{.}90$ Million

$($ii$)$ The company's required rate of return is $10\%$

$($iii$)$ Any surplus funds can be re$-$invested to generate a return of net cash flow of $14\%$ in perpetuity

$($iv$)$ The projects are indivisible

Advise on the optimal project combination.

a$.B$&$C$

b$.A$&$C$

c$.A$&$B$