Popular notions about migration to the United States from

Popular notions about migration to the United States from Latin America and the Caribbean are too often distorted by memories of earlier European migrations and through a tendency to generalize for the more familiar cases of Mexico and Puerto Rico

A.through a tendency to generalize for the more familiar cases of
B.through a tendency of generalizing from the more familiar cases of
C.by a tendency of generalizing from the cases which are more familiar of
D.by its tendency to generalize from the more familiar cases, those of
E. by a tendency to generalize from the more familiar cases of

First parallelism "caused by (...) and by".
Second "its" in D has no reference (what does it refer to?)
Third in C "of generalizing" is awkward and the last part is wordy and unclear.
IMO E

Waiting for OA... (and nice question,+1K)