Which Is NOT a Result of the Colonial Influence on Transportation

Which is NOT a result of the colonial influence on transportation within colonies (or former colonies) ?

A) Colonizers typically focused on the development of seaports that would allow them to export raw materials across the globe.
B) Many former colonies lack transport systems within the country, making it difficult to move from the seacoast to the interior.
C) In the aftermath of colonization, airline routes within countries, especially in Africa, have been greatly developed.
D) In some nations, it is easier to fly out of the country and back into it via another country, than it is to fly directly between points within the country.