In the context of stochastic, stationary policy evaluation, what is the new equation for policy evaluation?
a) V(s)=R(s)+γ∑s′P(s′∣s,a)V(s′)
b) V(s)=R(s)+γ∑s′P(a∣s,s′)V(s′)
c) V(s)=R(s)+γ∑s′P(s′∣a,s)V(s′)
d) V(s)=R(s)+γ∑s′P(s′∣s)V(s′)