If the price of 3G data bundles, a substitute for fixed-line data bundles, decreases, then:

Question

the supply curve of fixed-line data bundles will shift to the right.
the demand curve for fixed-line data bundles will shift to the right.
the equilibrium quantity and price of fixed-line data bundles will not change.
the demand curve for fixed-line data bundles will shift to the left.

Answer 1

the demand curve for fixed-line data bundles will shift to the left.