Answer: cultural diversity has its positive impact only if there is democracy, i.e. free movement of goods, ideas, people. If there is this freedom, then Europe is an extremely creative, free and progressive place. Europeans experienced times of nationalism, wars, revolutions so Europe in itself is not a guarantee of creativity, freedom and progressive thinking, but if there is a population able to establish really "European lifestyle" than diversity can have unique consequences.
Explanation: usually there is a tendency to supress differentness, but Europe experiences the worst consequences of such tendency so there is some sort of notion that diversity is creative and productive and that it is worth of taking care of. Impact ? Populations speaking different languages. educated, flexible, able to work with advanced technologies, psychologically open, accostumed to "different" things, able to travel to distant places and learn.
Http://www.un.org/un70/en/content/70ways
The correct answer is: "the demand curve will shift to the right".
Households are the economic agents whose will defines the demand curve. This curve represents combinations of prices and amounts demanded by them. In the case, the income has increased for all households within a market, the demand curve shifts right, which means that quantity component of all combinations has increased, and that at the same price more amount of the good is demanded by the consumers.
Such a shift is represented in the graph attached.