The expanded form of 31.005 is

• A.  \[3\times 10+1\times 1+\frac{5}{100}\]
• B.  \[3\times 10+1\times 1+\frac{5}{1000}\]
• C.  \[3\times 100+1\times 10+\frac{5}{1000}\]
• D.  \[3+1\times 100+\frac{5}{1000}\]