Empirical Tests Pertaining to the Determinants of Intra-Industry Trade at the Country

Empirical tests pertaining to the determinants of intra-industry trade at the country level tend to suggest that the amount of intra-industry trade

A) of a country is negatively related to the country's per capita income level.
B) between any two countries is negatively related to the geographic distance between The two countries.
C) of a country is negatively related to the country's total GDP level.
D) between any two countries is negatively related to the average income level of the two Countries.