Answer:
To translate literature into Arabic
Explanation:
The House of Wisdom is the public academy that took an active part in the translation movement. Most of the works of the Greeks and Syrians were translated into Arabic during the Abbasid Era. Many scholars studied in Baghdad and helped in the contribution of the translation of the academics. The movement saw its pinnacle when Al-Rashid, one of the Caliphs came into succession. He initiated great interest in the field of poetry and provided scholarships.
Answer:
centralized = concentrate (control of an activity or organization) under a single authority
I think that the answer is D, to create railroad networks that spanned the entire country
