23. Which sequence ranks the following aromatic rings of this compound in order of increasing reactivity in an electrophilicaromatic substitution reaction (slowest to fastest reacting)?  
(A) 3 < 2 < 1
(B) 2 < 3 < 1
(C) 2 < 1 < 3
(D) 1 < 3 < 2
(E) 1 < 2 < 3