(1) Let the set $P=\{m \mid-1<m<0\}, Q=\left\{m \mid m x^{2}+4 m x-4<0\right.$ for all real numbers $x$ always holds $\}$, then the following relationship that holds is ( ).
(A) $P \varsubsetneqq Q$
(B) $Q \varsubsetneqq P$
(C) $P=Q$
(D) $P \cap Q=\varnothing$
(1) A