Final answer:
The statement 'It is impolite to cut all the meat on your plate before you begin eating. Bread should be set aside.' is related to dining etiquette, suggesting that bread should not be fully prepared but instead broken and buttered piece by piece during the meal.
Step-by-step explanation:
The phrase that correctly completes the statement is "It is impolite to cut all the meat on your plate before you begin eating. Bread should be set aside." This is in reference to table manners and proper etiquette while dining. When dealing with bread at a meal, the customary practice is not to butter or slice it all at once but to break off a piece at a time, buttering each piece as you eat it, which implies the phrase 'set aside' fits well in the context of the statement.