Following three projects are contingent:

Project A

$-5,000$

Project B

$-6,000$

Project C

$-7,000$

$3,500$

$2,500$

$1,500$

$2,000$

$2,000$

$1,500$

$2,000$

$3,000$

$1,500$

$1,500$

$2,000$

$2,500$

The highest financing rate to accept all projects is$\_$

$($a$)14\mathrm{.}90\%$

$($b$)17\mathrm{.}71\%$

$($c$)15\mathrm{.}92\%$

$($d$)14\mathrm{.}92\%$