Your Answer would be Britain and Russia. Simply because the other options are not euro countries(save Germany). Yet also Britain and Russia really did have control as well.
Britain and Russia had influence over Iran during the 20th century. Option A is correct.
The great peaceful Constitutional Revolution of 1906 forced the Iranian shah at that time to declare Iran a constitutional monarchy with legislative powers vested in a majles, or parliament. The shahs did not fulfill their constitutional promised, therefore, the Russian and British encroachment was even increasingly perilous.
