某折线形边坡资料如下：Q₁=923 kN；α₁=42°；C₁=12 kPa；ψ₁=18°；l₁=11.2 m；Q₂=1094 kN；α₂=45°；C₂=15 kPa；ψ₂=24°；l₂=13.8 m；Q₃=1029 kN；α₃=13°；C₃=30 kPa；ψ₃=20°；l₃=13.0 m；该滑坡的稳定系数F_s为()。A、0.90