数列\(\{a_{n}\}\)满足\(a_{1}= \dfrac {1}{4}\)，\(a_{n+1}= \dfrac {1}{4-4a_{n}}\)，若不等式\( \dfrac {a_{2}}{a_{1}}+ \dfrac {a_{3}}{a_{2}}+…+ \dfrac {a_{n+2}}{a_{n+1}} < n+λ\)对任何正整数\(n\)恒成立，则实数\(λ\)的最小值为\((\) \()\)
A. \( \dfrac {3}{8}\)
B. \( \dfrac {3}{4}\) C. \( \dfrac {7}{8}\) D. \( \dfrac {7}{4}\)
