Which plan has the least amount of risk?

Plan A

Payout P$($Payout$)$

$$25,0000\mathrm{.}51$

$$50,0000\mathrm{.}32$

$$100,0000\mathrm{.}17$

Plan B

Payout P$($Payout$)$

$$$$45,0000\mathrm{.}32$

$$40,0000\mathrm{.}3$

$$80,0000\mathrm{.}38$