The correct answer is true.
It is true that most of Africa had been taken over by Europeans by 1914.
We are talking about the Scramble for Africa, in which European powers such as Great Britain, France or Portugal, colonized the territories of the African continent and even formed new territories that fit their political and economic interests. The Scramble for Africa started in 1881 and by 1914, most of Africa had been taken over by Europeans. European nations were only interested in exploiting the raw materials and natural resources of Africa.