Consider the following matrix with one empty block in the lower extreme corner :

○ ○ ○○△ △	○ ○ ○△ △ △	○ ○△ △ △
○ ○ ○△	○ ○△ △	○△ △ △
○ ○△	○△

Which of the following figures could fit in the empty block and thus complete the matrix ?