Why Would It Be Very Improbable for Our Universe to Have

Why would it be very improbable for our universe to have Ω _mass+ Ω_Λ =0.9?

A) It would quickly evolve to have a much different value of Ω_mass +Ω_Λ.
B) In order to exist,every universe must have Ω_mass + Ω_Λ =1.
C) We know Ω_mass = 1,based on the average density of galaxies.
D) The fluctuation in the CMB tell us that Ω_mass + Ω_Λ = 0.7.
E) Dark energy studies tell us Ω_Λ = 0.9.