The compounds that penetrate the human body best are ... Select one: a. the ones that are insoluble in water but are somewhat soluble in grease. b. the ones that are insoluble in both water and grease. c. the ones that are somewhat soluble in water but not grease. d. the ones that are somewhat soluble in both water and grease.

Answer: Option D. the ones that are somewhat soluble in water and grease

Explanation: ionic solvent (polar solvent) readily dissolve in water while oils dissolve in grease. The most common substance that can dissolve in grease and water is soap.

Soap has both hydrophilic and hydrophobic ends which makes it readily dissolve in water and grease. The hydrophilic ends contains a polar head while the hydrophobic ends contains a non polar hydrocarbon tail