A simple question. If you want further comment/variation, request and I'll try my best.
(;AW[dp]AW[dn]AB[fq]AB[jp]AB[qq]LB[np:A]LB[nq:B]C[A or B?]AP[goproblems]
(;B[jl]C[This path's here just so the board view matches the book.])
(;B[nq]C[Too low; the 3-3 stone itself is already low. Also, the 3-3 stone adds a lot of strength, so it's unnecessary to play so safe. ])
(;B[np]C[Indeed. This is the right height; it makes good influence, and an extension along the right side would be better than for black B.RIGHT]))