Well, Fowler is a little out of date now, and I imagine that many of his suggested inversions would be considered overprecious, but:
1-- B is not a correct correction of A. Fowler is saying that A should read '
To these causes may be attributed our disasters'-- thus placing the subject,
disasters, at the absolute end. If we use the longer subject, then this would be OK:
To these causes may every one of the disasters that have come upon us be attributed.
2-- I don't even understand his rationale on this one, since I don't see a compound verb (e.g.
run and jump)-- all I see is a verb phrase (
must...go --
to find is just a verb complement). However, what he wants to say (I think) is that in D,
must we go to find is wrong, and equally wrong would be
must lie. He wants to see a longer, more emphatic noun phrase as subject:
Much deeper down than the history of the human race must our university researchers go to find the beginnings of these connections.
.