What is the IUPAC name of diisopropyl ketone?

• A. 1,3-Diisopropylpropan-2-one
• B. 2,4-Dimethylpentan-3-one
• C. 2-Methyl-1-(1-methylethyl)propan-1-one
• D. 1,3-Dimethylpropan-2-one