The most important reason why two countries that have the same GDP can have vastly different standards of living is because of

Apopulation size.
Bincome distribution.
Caccess to health care.
Daccess to consumer goods.

Verified Answer :

population size  cause it wright

Answer:

A.

Explanation:

Countries with the same GDP can have different standards of living because of the differences in population size. A less populated country can have the same GDP as a more populated and the less populated one will have a much better living standard because the inequalities will be reduced when comparing to a bigger country.