What is the difference between the activities required to use the focused differentiation strategy and those of the industry$-$wide differentiation strategy?

Question $27$ options:

There is no difference in the activities required for the two strategies.

The activities required to use the focused differentiation strategy and those of the industry$-$wide differentiation strategy differ primarily in their pricing strategies.

The activities required for the focused differentiation strategy are largely different from those of the industry$-$wide differentiation strategy.

The industry$-$wide differentiation strategy does not require any primary value$-$chain activities.