Considering the situation described above, to determine who should receive his memo, Keitaro would need to consult "Organization Charts."
This is because an Organization Chart is a pictorial representation that shows the structure of an organization.
It usually depicts those or the top ranks at the top, while the lower ranks are placed accordingly.
It also shows the relationships and positions or jobs of the ranks or individuals presented on the organization charts.
Organization charts is often referred to as organogram.
Hence, in this case, it is concluded that the correct answer is option A. "organization chart."
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