The order of `S_(N)1` reactivity in aqueous aceic acid solution for the compounds
`underset((1))(H_(3)C-overset(O)overset(||)(C)-CH_(2)-CI)" "underset((2))(H_(3)C-CH_(2)-CH_(2)-CI)" "underset((3))((H_(3)C)_(3)C-CI)`
A. `1 gt 2 gt 3`
B. `1 gt 3 gt 2`
C. `3 gt 2 gt 1`
D. `3 gt 1 gt 2`