According to Thiem, the permeability of an aquifer may be obtained from the equation

• A. <img src="/_files/images/civil-engineering/water-resources-engineering/176-8.123-1.png">
• B. <img src="/_files/images/civil-engineering/water-resources-engineering/176-8.123-2.png">
• C. <img src="/_files/images/civil-engineering/water-resources-engineering/176-8.123-3.png">
• D. <img src="/_files/images/civil-engineering/water-resources-engineering/176-8.123-4.png">
• E. all the above.