Arrange the compounds in order of decreasing reactivity for nucleophilic addition reaction :
`CH_(3)-overset(O)overset(||)C-underset("I")CH_(2)-Cl" "Cl-CH_(2)-underset("II")overset(O)overset(||)C-H" "H-overset(O)overset(||)C-H" "H_(3)C-underset("IV")overset(O)overset(||)C-CH_(3)`
A. `I gt IV gt II gt III`
B. `I gt II gt III gt IV`
C. `II gt III gt I gt IV`
D. `II gt I gt III gt IV`