Answer:The ancient Romans developed many new techniques for buildings and construction of all types including concrete, Roman roads, Roman arches, and aqueducts.
Explanation: Got it from google btw.
Although many peoples settled in east africa, including arabs and persians, much of madagascar was settled by people from Indonesia, that immigration took place approximately in 830 bc, according to some DNA study that traced their genetic heritage back to Indonesias.
Answer:
I think it is A i am sorry if i am wrong:(