At harvest days, rice prices only reaches Rp3.000.000,00 per ton and the demand reaches 30 tons, but at the time of scarcity before harvest days, rice prices bounce high and reaches Rp4.000.000,00 per ton with the demand only about 25 tons. Based on data above, the coefficient of demand elasticity is ....

A. 0,045

B. 0,06

C. 0,50

D. 2,00

E. 5,00