D) He concludes that landlines must cause serious damage if so many people were on crutches and combined that conclusion with the fact that the photojournalist was still willing to work in that area.
Alex's inference was that photojournalists need to be willing to take risks.
Answer D says, He concludes that landmines must cause serious damage if so many people were on crutches and combined that conclusion with the fact that the photojournalist was still willing to work in that area.