Arrange the following in correct activating order towards `EAS` -
`{:(underset(I)(-NHCOCH_(3)),,underset(II)(-O-overset(O)overset(||)C-CH_(3)),,underset(III)(-overset(+)(NR_(3))),,underset(IV)(-NH_(2))):}`
A. `IIIltIltIIltIV`
B. `IVltIltIIltIII`
C. `IIIltIIltIltIV`
D. `IIltIIIltIltIV`