Decide Whether $\subset$ $\subseteq$ , Both, or Neither Can Be Placed in the Blank

Multiple Choice

Decide whether $\subset$ , $\subseteq$ , both, or neither can be placed in the blank to make a true statement.
- $\{ 9,10,11 \}$ _ $\{ 8,9,10,11 \}$

A) $\subseteq$
B) Neither
C) Both $\subset$ and $\subseteq$
D) $\subset$