After the joseki, white played W1, W3 to get centre thickness. What is the best way for black to connect his stones?
(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]
RU[Japanese]SZ[19]KM[0.50]TM[]
AW[pn][ro][lp][mp][qp][rq]AB[op][kq][lq][pq][qq]LB[lp:1][mp:3][lq:2]C[Black to play - don't help white too much!]
(;B[nr]CR[nr]
(;W[nq]CR[nq]
(;B[or]LB[nn:D][on:C][no:A][oo:B]CR[or]C[If now WA, black can cut with BB, WC; BD, so the white thickness isn't worth much RIGHT CHOICE])
(;B[mq]CR[mq]
;W[np]CR[np]
;B[or]CR[or]
;W[oo]CR[oo]C[NIce white centre thickness!])
(;B[mr]CR[mr]
;W[oq]CR[oq]
;B[or]CR[or]
;W[pp]CR[pp]C[very thick thickness for white :)])
(;B[oq]CR[oq]
;W[np]CR[np]
;B[mq]CR[mq]
;W[oo]CR[oo]C[nice white centre thickness!]))
(;W[np]CR[np]
(;B[oo]LB[nq:A][or:B]CR[oo]C[If WA, BB and black is safe RIGHT CHOICE])
(;B[nq]CR[nq]
;W[oo]CR[oo]C[Nice white centre thickness!])))
(;B[mq]CR[mq]
;W[np]CR[np]
;B[nq]CR[nq]
;W[oo]CR[oo]C[White has secured nice centre thickness])
(;B[nq]CR[nq]
;W[mq]CR[mq]
;B[mr]CR[mr]
;W[np]CR[np]
(;B[or]CR[or]
;W[oo]CR[oo]C[White has secured nice centre thickness])
(;B[oo]CR[oo]
;W[nr]CR[nr]
;B[oq]CR[oq]
;W[lr]CR[lr]C[Black is separated])
(;B[oq]CR[oq]
;W[oo]CR[oo]C[nice centre thickness for white!])))
