The answer is A.
An idiom.
The tone of the essay "A Modest Proposal" on a literal level is observant and objective. Throughout the essay, Swift shows the readers what he had observe of the poor people in an objective manner. Hence the observant and objective tone. In a satirical level, it denotes a pleading tone. Swift is proposing a solution to what he had observed and therefore pleaded with the people who can carry out his proposal.
The correct answer would be d
❀an object or type of material that allows the flow of charge (electrical current) in one or more directions.❀