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

Multiple Choice

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

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