very interesting hand. below is all based on your ABC read.

given your range assigned we only really beat QJ A10 and KJ and K10 Q10, and even then they are all combo draws, whilst we lose to A9s J9s 98 99 1010 109 9J KQ J10 87s. combination wise we beat 8+9+8+12+12=49 and combos that beat us are 2+2+1+3+6+4+16+6+4=44. although if you think he is flatting A9o and 87o this becomes much more difficult to bet profitably.

another factor to consider is are we getting value from many rivers,

assuming we barrel turn i dont think we get called by the range we beat on K, A Q 10 8 rivers, where all/most hands that beat us will call a 3rd barrel. also if we check river everything we beat checks back. So we could double barrel and c/f A K Q 10 8 rivers.

and triple barrel J/9 rivers for value obv.

if the board comes 7-2 i think JK A10 JQ all call but Q10 K10 all fold. so we now get called by 24 less combos. (although they may call a small blocker bet, unsure) 

(given opponents range it is more likely than usual that river will bet 7-2 given discounting but im not sure how to do that)

where as if we check/call turn alot of what we beat checks back and im unsure if combos like QJ JK K10 and Q10 will bet turn if we check, if they dont then c/f turn and b/f on 7-2, A rivers and b/c on J rivers is good. since now K10 and Q10 will probably call(at least more often,)

also given villain is ABC i dont expect them to raise almost any hand on this turn given our percieved range. (it doesnt make sense for him to raise sets and 910 KQ imo) (87s may raise but its only 4 combos)

(you didnt state suits but im assuming J on turn completed the rainbow?) (does our A match the suit of either of the 9x on flop, iv assumed not)

so basically will villain bet K10 QJ JK and Q10 on turn if we check? if no then i like c/f turn and and b/f river on  9,A,J,7-2 for think value if villian checks behind and c/f river on Q K 10 8 rivers.

if villain will bet those hands then i prefer b/f turn and blocker b/f 7-2,A,J and c/f the rest (Q K 10 8). 

basically i think c/c turn is really tough since everything we lose to will bet turn but a ton of stuff we beat will sometimes check back, so i prefer to value b/f or c/f turn depending on what you think they do with the part of their range we beat.

so basically double barreling makes it harder to get value on the river, so we put in a smaller blocker bet that Q10 K10 may or may not call. also if he is going to check back JK QJ Q10 K10 c/f on turn becomes alot better since we can pretty much narrow his range to those hands and random slow plays when he checks back and go for value on river with a bigger sizing.

highly doubt an ABC player floats underpairs