The format of solving and calling rigid rigid equations in accordance with the grammatical rules is:

A、[t,y]=ode15s(f,[0,tn],x0,ff,mu);

B、[t,y]=ode15(f,[0,tn],x0,ff,mu);

C、[t,y]=ode15s(f,x0,ff,mu);

D、[t,y]=ode15s(f,[0,tn],mu)