The answer is B, The relative pronoun is that; it functions as part of the adverb clause.
In this central claim made by the narrator in this passage.
seamen are mostly uninterested in land related matters but Marlow had a wide range of interests
Marlow a seamen, was out of job for a certain period. He needed a ship but got nothing. He got appointed quite smoothly owing two things : his aunt's relations in the higher administration and the murder one of the ship's captain in Congo. Marlow calls the land of the Congo " prehistoric" and he considered himself among the first of man taking possession of an accursed inheritance.
Marlow exposes the bitterness of American life .
the anger of unstirred of the white men that killed them without any resort. The black peoples escaping the invading whites and in doing so, they were being slaughtered either by hunger or they were being caught by the "civilized" white man that yoked them for drudgery. The natives are also enemies of each other. tribal system is also there and utterly divided Africa which lured was engulfed in darkness and invited a rather graver darkness of greed and lust from outside its heart
Means that as long as your evil thoughts remain thoughts, then you won't be punished or thought less of by people.
But if your actions are evil, then you will be punished and considered evil by other people, even if your intentions weren't evil (although perhaps get a lesser sentence in court).
Answer:
It is healthier to talk to your friends instead of communicating via social media, You can also easily be hacked, get your information exposed to the world and to people that shouldn't know. A cell phone distracts people from what is happening around them. Useless and a big NO.