Timbuktu was considered a MASSIVE trade center in Mali. That is how all of the foreign goods came into the kingdom. It also had education centers which was very important in Mali.
I am pretty sure the answer is A
The volume can be calculated through the molar volume and the moles values.
Molar volume = volume / number of moles
volume= molar volume x number of moles
volume= 27.6 <span>l/mol x </span><span>0.0775 mol</span>
volume= 2,139 L