The Flatness Problem Arises Because Only a Universe with __________ $\varOmega$

Multiple Choice

The flatness problem arises because only a universe with __________ can have that value forever.

A) " $\varOmega$ _mass + $\varOmega$ _$\wedge$ = 0"
B) " $\varOmega$ _mass + $\varOmega$ _$\wedge$ = 1"
C) " $\varOmega$ _luminous + $\varOmega$ _$\wedge$ = 1"
D) " $\varOmega$ _luminous + $\varOmega$ _$\wedge$ = 0"