The Scandinavian assault on Western Europe culminated in the early eleventh century with the Danish conquest of the English kingdom, which other Scandinavian kings attempted to repeat, unsuccessfully later in the same century.
The Scandinavian assault on Western Europe culminated in the early eleventh century with the Danish conquest of the English kingdom, which other Scandinavian kings attempted to repeat, unsuccessfully later in the same century.
A. which other Scandinavian kings attempted to repeat, unsuccessfully, later in the same century
B. which other Scandinavian kings attempted to repeat later that same century, but not successfully
C. an achievement that other Scandinavian kings attempted later in the century to repeat, but were not successful at it
D. an achievement attempted later in the century by other Scandinavian kings that was not successful
E. an achievement that other Scandinavian kings attempted to repeat later in the century, but without success (E)
but, you do have a point here: there are certainly structures in the greater written english language in which "but" doesn't connect parallel structures. e.g.,
She eats junk food, but only on weekends.
the question (which is still unanswered, as far as i'm aware) is whether GMAC would countenance such constructions. if you have any solid evidence either way, i'd love to see it.