Sentence Correction

Even though Clovis points, spear points with longitudinal grooves chipped onto their faces, have been found all over North America, they are named for the New Mexico site where they were first discovered in 1932.

(A) Even though Clovis points, spear points with
longitudinal grooves chipped onto their faces,
have been found all over North America, they
are named for the New Mexico site where they
were first discovered in 1932.

(8) Although named for the New Mexico site where
first discovered in 1932, Clovis points are spear
points of longitudinal grooves chipped onto
their faces and have been found allover North
America.

(C) Named for the New Mexico site where they have
been first discovered in 1932, Clovis points,
spear points of longitudinal grooves chipped
onto the faces, have been found all over North
America.

(D) Spear points with longitudinal grooves that are
chipped onto the faces, Clovis points, even
though named for the New Mexico site where
first discovered in 1932, but were found all over
North America.

(E) While Clovis points are spear points whose faces
have longitudinal grooves chipped into them,
they have been found all over North America,
and named for the New Mexico site where they
have been first discovered in 1932

Answer is A

Hi All,

Please help me in understanding choice (B) in comparison to choice (A) and really apologize if I haven't put other choices. I have doubt only in these two choices.

I can certainly select (A) as an answer, but when I compared it with (B), I got confused. So, I looked from contrasting point of view. What are these two choices actually contrasting.

(A) contrasts :- "spear points have been found" with "naming of spear point."
(B) contrasts :- "naming of spear points" with "clovis points are spear points...."

O.G says (B), The sentence structure indicates that the expected incompatibility is between the geographically based name of the points and their physical properties, which makes no sense.

I believe it is talking about contrast. Can anyone please clarify my doubt ?

Thanks & Regards
Vinni