Kaplan 800---Grand canyon

[prachich1987]

Those who have visited the Grand Canyon have typically seen layers of sediment in the gaping canyon, with different colors that mark the passage of time like the rings in a tree trunk.

(A) seen layers of sediment in the gaping canyon, with different colors that mark
(B) seen layers of sediment in the gaping canyon, whose different colors mark
(C) been seeing layers of sediment in the gaping canyon, whose different colors are markers of
(D) been able to see layers of sediment in the gaping canyon, with different colors marking
(E) seen layers of sediment in the gaping canyon, marking by different colors

The OA is A
I understand B is wrong here.
OE says that in B it's not clear whether "whose" refers to "canyon" or to "layers"
It may sound dumb, I am not very well convinced with it.
I think it should refer to layers as layers are having different colours.But ultimately layers are a part of canyon.
So it is ok I guess.

[Target2009]

Those who have visited the Grand Canyon have typically seen layers of sediment in the gaping canyon, with different colors that mark the passage of time like the rings in a tree trunk.

(A) seen layers of sediment in the gaping canyon, with different colors that mark
(B) seen layers of sediment in the gaping canyon, whose different colors mark
(C) been seeing layers of sediment in the gaping canyon, whose different colors are markers of
(D) been able to see layers of sediment in the gaping canyon, with different colors marking
(E) seen layers of sediment in the gaping canyon, marking by different colors

My Pick was A,

OE says that in B it's not clear whether "whose" refers to "canyon" or to "layers"
It may sound dumb, I am not very well convinced with it.
I think it should refer to layers as layers are having different colours.But ultimately layers are a part of canyon.
So it is ok I guess.

You are right but thats what is unambiguity.

Those who have visited the Grand Canyon have typically seen layers of sediment in the gaping canyon, layers different colors mark the passage of time like the rings in a tree trunk.

Those who have visited the Grand Canyon have typically seen layers of sediment in the gaping canyon, canyon different colors mark the passage of time like the rings in a tree trunk.

Both of above looks correct & thats what is unambiguity.

[prachich1987]

Thanks Target 2009 !!!
I got it

[Target2009]

Thanks Target 2009 !!!
I got it

Nice one for usage of Whose : https://www.beatthegmat.com/whose-t68207.html