If they say that demand (in general) has increased, they mean that?

Question

A- There has been a movement upwards along a given demand curve

B- The demand curve has shifted to the right

C- the demand curve has shifted to the left

D-there has been a movement downward along a given demand curve

Answer 1

B - The Demand curve has shifted to the right.

Any movement along he same demand curve (A and D) will be reflected merely as a price increase or decrease and that would be a price change, not a change in demand.

A change in demand means a change in the quantity demanded so that implies a shift of the entire curve. If it moves to the left, then quantity diminishes (C) and if it shifts to the right, quantity increases (B).