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Multiple modifiers in the below question are confusing to me.
Can someone please explain me why the right answer is right?

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.

The correct answer.

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

Misplaced modifier: What exactly was first discovered in 1932?
Preposition error: of longitudinal grooves is incorrect; the correct preposition is with.

(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.

Tense error: they have been first discovered in 1932 should be in the past tense, not the present perfect.
Preposition error: of longitudinal grooves is incorrect; the correct preposition is with.

(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.

A mess!
Tense error: with longitudinal grooves that are chipped onto the faces. Since the chipping happened in the past, are is the wrong tense.
Modifier error: What exactly was first discovered in 1932?
Conjunction error, Missing modifier: but were found all over North America. No need for the conjunction but. A modifier is needed to show the contrast in time. Sentence should read Clovis points...were later 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.

Also a mess.
Conjunction error: While is incorrect. The fact that Clovis points are spear points is being contrasted with the fact that they have been found all over North America.
Tense/Parallelism error: and named should be and are named in order to be parallel with they have been found
Tense error: they have been first discovered in 1932 should be in the past tense, not the present perfect.