An aquarium has a rectangular base that measures 100 \mathrm{~cm} by 40 \mathrm{~cm} and has a height of 50 \mathrm{~cm}. The aquarium is filled with water to a depth of 37 \mathrm{~cm}. A rock with volume 1000 \mathrm{~cm}^{3} is then placed in the aquarium and completely submerged. By how many centimeters does the water level rise?
Answer Choices
A. 0.25
B. 0.5
C. 1
D. 1.25
E. 2.5