The "control" phase of the six sigma dmaic is intended to ensure that:
a. the proper subset of process inputs are monitored.
b. variability reduction is pursued.
c. data analysis is overseen.
d. inputs are closely monitored.
e. improvements are sustained.

answer; /// i believe that the correct answer is that it lets you see and evaluate different formats as you develop your workbook;

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.

it should be d or b but i'm sure it's d