Question

That's the best way you thought of ________ into the dangerous areas.

1. A.
   stopping people getting
2. B.
   to stop people getting
3. C.
   to keep people getting
4. D.
   preventing people from getting

Answer 1

B
you thought of是先行词way的定语从句“做某事的方法”为the way to do/of doing, stop sb. doing=stop sb from doing阻止某人做某事，而C项keep sb. doing应为keep sb. from doing。