Which caliphate reformed tax collections and government systems?

a) Umar

b) Abu Bakr

c) Uthman

d) Ali

Ali (d)

Explanation:

The caliph that reformed tax collections and government systems is Ali.

Ali ibn Abi Talib. was the fourth Caliph of Islam. like his predecessors he achieved economic/administrative reforms that placed Islam in the forefront of the world. and he also closely oversaw public policy, establishing an advanced administration for newly conquered lands. he also was the Caliph to reform tax collections and government systems

A Caliph is a Muslim religious and civil leader whom is recognized as the successor of Muhammad.