A$.$

$($Strong$,$ Rd$)$ is a Subgame Perfect Equilibrium

B$.$

$($Strong$,$ Dd$)$ is a Subgame Perfect Equilibrium

C$.$

$($Weak$,$ Dd$)$ is a Subgame Perfect Equilibrium

D$.$

$($Weak$,$ Rd$)$ is a Subgame Perfect Equilibrium