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

The OA is A. OG explanation for while, although, even though is as follows

"Even though, although, and while introduces clauses that appear to be logically incompatible but in fact are not." -
Can someone explain what does GMAC mean by "logically incompatible but in fact are not".

Hi gmatrant --

The way we look at it is that those specific words are used to introduce a fact that is surprising, based on two ideas that you would think contradict each other.

Here's an example:

"Although most people think of bats as flying rodents, they are actually more closely related to horses than to mice."

The purpose of "although" is to signal that we're talking about something that seems to be true, but is not. In this example, the "Although" phrase is stating something that people believe (but which is wrong); the second part then explains the reality of it, or the actual truth.

So in your example, if we break it apart, we get idea 1:

Clovis points are named after a specific place in New Mexico

and idea 2:

Clovis points are found all over North America

(The definition of what Clovis points are doesn't relate to this part of the discussion.)

The meaning of sentence is playing off of this: Many people might assume that something which is named after a place would only be found in that place. So, by combining these two ideas, you show the "surprising" part, in conjunction with the part that you'd assume to be true.

The "Even though" phrase (or "although" or "while") is a way to make the contrast.

Instead of the GMAC's phrase "appear to be logically incompatible", we might say "seem like they would not fit together" or maybe "on first glance, you'd think they would contradict each other."

Hope this helps!
EssaySnark