As a market leader, Nike broadens its product lines by investing $10$ million dollars to venture into the territory of high$-$tech waterproof jackets in order to keep its leading role in the increasingly competitive sports wear industry. This is an example of $\_\_\_\_\_\_\_\_\_\_\_$ defense.

Question $4$ options:

A$)$

mobile

B$)$

contraction

C$)$

counteroffensive

D$)$

position

E$)$

flank