Q: In diffuse-porous woods, if the demarcation between rings is obvious, what type of difference within the ring might not be?
A: In the diffuse-porous woods, the demarcation between rings is not always so clear and in some cases is almost (if not entirely) invisible to the unaided eye.
Does the answer correctly answer the question

Available options:
[I] yes.
[II] no.
[II]