Sadly, Captain Canot didn't believe that the treatment of slaves was a problem. Like most people in his time, it was common to think of slaves as only sub-humans. To Captain Canot he was just carrying regular old cargo that just so happened to be alive and breathing.
Captain Canot was a person who captured slaves to make them work for him, he gave them little privileges and had zero qualms about it.
(I wasn't able to get access to any text for a clearcut example, but essentially you're supposed to find an example in whatever text you are reading to support that he was completely ok with slavery. Like, in what ways did he explicitly imply that slavery is a good thing, or what actions and feelings do he have towards it being a thing? And then explain it.)
B. Solar power saves money for the user and makes the world a better place all around.
A is a personal opinion, C is not specific at al, D is factual, but it doesn't exactly make sense because though it helps the environment it doesn't really sustain our resources. Therefore B is the correct answer.
It would be
To develop Characters by displaying their interactions.
