A company may become more exposed or sensitive to an individual currency's movements over time because

(I think It is b just trying to check my work, and another post of this questions has seemingly eliminated D)

a. The company has reduced its involvement in the country represented by that currency.

b. The company has increasingly used the currency to purchase goods.

c. The company has increased its hedging.

d. All of the these choices are possible reasons for an increased sensitivity to the individual currency's movement.