What Was the Primary Problem the English Faced in Decolonizing

What was the primary problem the English faced in decolonizing their African territories?

A) They argued that the indigenous population did not have an intellectual and economic elite.
B) White settlers from Europe held the majority of land and political power.
C) Kenyan resistance by the Mau Mau initiated a five-year war.
D) White settlers refused to leave their homes and were sometimes violent.
E) All of these.