Consider a Boolean function $f.$ Assume that $f$ in $T_0,f$ not in $T_1.$ What statements can be true for $f?$

a$)f=$ const

b$)f$ in $L$

c$)f$ in $M$

d$)f$ in $S$

I've been answered but I have a question. If I considered f$($x$)=0,$ that would be in T$0$ but not in T$1$ and would also be constant and linear. And if I had f$($x$,$ y$),$ when f$(0,1)=$ X $($doesn$\text{'}$t matter$).$ Then if I increase x by $1,$ having f$(1,1)=0,$ because f$($x$,$ y$)$ not in T$1.$ Because f$(0,1)>$ f$(1,1)$ that would mean it's not monotone. Maybe I$\text{'}$m just a little confused between the concepts. Any recommendation is greatly received.