The answer is B, to add something or clarify a statement
Answer and Explanation:
The challenges that could be encountered on this planet are related to the possibility of human beings being able to live on it with all the elements necessary for their survival. Thus, the challenges would be related to the planet's atmosphere, temperature, air and water quality and soil fertility for agriculture.
To overcome these challenges it would be necessary to establish a deep and well-formulated scientific research, able to recognize whether these factors exist on the planet, making life possible.
The rules for living on this planet would be very simple, but they would promote a society that does not pollute and degrade the planet as it was done with the earth. The rules would have serious impositions for those who disobeyed them, preventing the planet from being degraded.
In "My Last Duchess" by Robert Browning, the situation which brings the duke and the agent together is the duke's intention to remarry.
His wife died (or was killed, we will never know for sure), and he lost a lot of money, which is why he needs to marry into a rich family so as to regain what he lost. This is the reason why he met with the agent, so as to marry his cousin or something.
