The data lag is the time between a. the enactment of a policy and the implementation of the policy. b. the occurrence of an event and policymakers realizing the event has occurred. c. realizing a policy is needed and enacting the policy. d. the implementation of a policy and when the impact of the policy is felt.

B. the occurrence of an event and policymakers realizing the event has occurred

Explanation:

The data lag is the time between the occurrence of an event and policymakers realizing the event has occurred.

Data lag simply refers to the time it takes for a particular data to be available in the data warehouse it database after the occurence of an event.

Therefore, the correct option is B.

its d i know cause i've been googling it

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.