Why Did the Revenues of Aramex Drop by an Average

Why did the revenues of Aramex drop by an average of 9 percent in the first two quarters on 2009?

A) A new competitor had entered the market.
B) Aramex management had increase prices in the preceding quarter.
C) There was a global slowdown in freight forwarding activity.
D) Tariffs were introduced that restricted the Jordanian export trade.