What Was Portugal's Main Concern Regarding Africa During the Imperial

What was Portugal's main concern regarding Africa during the imperial period?

A) To prevent Germany and France from taking the few colonies the Portuguese still possessed.
B) The Portuguese wanted to maintain a friendship with France so its ships could use the Suez Canal.
C) To avoid the threat of being incorporated into Spain while other European countries were preoccupied with Africa.
D) The Portuguese were trying to hold on to more land in Africa than Spain possessed.
E) The Portuguese wanted to maintain their pace of industrialization at home.