In the passage, "subtle" most nearly means
- Aweak and useless
- Bnot immediately obviouscorrect
- Cbrightly colored
- Dopenly hostile
Why B is correct — and why the others are not
"subtle" means not immediately obvious in this context because only a side-by-side inspection revealed the change. This matches the evidence or condition involving subtle. A final check is tracking what the second text accepts before what it changes.
A. The passage does not support "weak and useless"; the clue is that only a side-by-side inspection revealed the change.
C. Nothing in the passage suggests "brightly colored"; that idea is outside the context provided.
D. The context points to only a side-by-side inspection revealed the change, not to "openly hostile."