Convection currents occur in the MANTLE. The mantle is the second layer of the earth after the crust. The mantle is approximately 2900 km thick. Convection currents are triggered or fueled by the heat from the Earth's core.
The part of the mantle closest to the core gets heated. It then becomes less dense than the layers above so it rises. When this rising plume interacts with the crust it cools and becomes more dense than the layers below and so it sinks and this circular motion continues to form convection currents.
The answer is Mandate System. This is the system that used
to divide or to partition Southwest Asia between Great Britain and France
following WWI. This system was established for the reason to administer the
German and Ottoman empires World War Territories.
I believe its b , hope it helps