Humphreys' collecting data for the Tearoom Trade study under the pretense that he was a lookout is an example of a violation of the principle of:

what are local authorities doing to fix the problem

explanation: what are local authorities doing to fix the problem

b) that he was not a free man

pan-africanism or pan-africanism is a political, philosophical, cultural and social movement that promotes african twinning, the defense of the rights of african people and the unity of africa under a single sovereign state, for all africans, both africa as of the african diasporas.

there are many answers to this question, such as a diplomat, ambassador, soldier, united nations employee, cia, etc.