A system has three components in series with reliabilities $0\mathrm{.}9,0\mathrm{.}71,$ and $0\mathrm{.}86.$ System reliability is

Group of answer choices

none of these

$0\mathrm{.}8$

$2\mathrm{.}5$

$0\mathrm{.}988$

$-0\mathrm{.}54954$