Critical aspects of a successful investigation include thorough planning and preparation, efficient information management, a focus on effective communication, and a(n):

an advanced role definition and delineation of responsibilities

Explanation:

According to my research on the investigation procedures, I can say that based on the information provided within the question the last thing missing would be an advanced role definition and delineation of responsibilities. This basically means assigning certain tasks and responsibilities to all those involved in order for the investigation to go smoothly and so that nobody causes interference in the other's task.

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muslims control the north africa during the period of 1500 up

to 1800. they made a barrier to prevent further european exploration from

entering the africa from the north. however, the dutch ware still able to move

toward the interior with having south africa as one of the routes leading to

the east for trading with asia.

answer; empowerment and collaboration;