Read the quotation from Henry David Thoreau’s Walden. Once it chanced that I stood in the very abutment of a rainbow’s arch, which filled the lower stratum of the atmosphere, tinging the grass and leaves around, and dazzling me as if I looked through colored crystal. It was a lake of rainbow light, in which, for a short while, I lived like a dolphin. If it had lasted longer it might have tinged my employments and life. Which is the best example of a vivid sensory detail?

1.“Once it chanced that I stood”
2.“If it had lasted longer”
3.“which, for a short while”
4.“It was a lake of rainbow light”