Just as the Congress is the legislative branch of the

Just as the Congress is the legislative branch of the Federal government of the United States, so Parliament is the legislative body of the United Kingdom of Great Britain and Northern Ireland.

b) As Congress is the legislative branch of the Federal government of the United States,
c) As Congress is the legislative branch of the Federal government of the United States, in the same way
d) Just as Congress is the legislative branch of the Federal government of the United States, so
e) Just as the Federal government of the United States’ legislative branch is Congress

please explain your answer. I don't think I have seen the grammar/style of this one. OA later