A、A number of reasons may explain as to why the price of coffee has decreased.
B、Several reasons are responsible for the falling price of coffee.
C、A number of reasons may explain the decrease in the price of coffee.
D、What are the reasons that coffee prices have fallen? There're considerable possibilities.
E、All right, it is necessary to consider what causes the reduction of coffee price. There are plenty of possibilities.
F、A lot of possible reasons can explain the falling of coffee prices. It remains unclear why coffee prices have fallen.