The completion in 1925 of the Holland
Tunnel, linking Manhattan with New Jersey’s highways, which permitted 2,000 cars to pass through each tube every hour and was hailed as the decade’s $48 million engineering masterpiece.
(A) Tunnel, linking Manhattan with New Jersey’s highways, which permitted 2,000 cars to pass through each tube every hour
and(B) Tunnel, linking Manhattan with New Jersey’s highways and permitting 2,000 cars to pass through each tube every hour,
it(C) Tunnel, linking Manhattan with New Jersey’s highways and permitting 2,000 cars to pass through each tube every hour,
(D) Tunnel linked Manhattan with New Jersey’s highways, which permitted 2,000 cars to pass through each tube every hour and
(E) Tunnel
linked Manhattan with New Jersey’s highways, permitting 2,000 cars to pass through each tube every hour,
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1. Using of "which" after "highways" means that the first modifies the second.
"Which" can not modify "The completion in 1925 of the Holland Tunnel, linking Manhattan with New Jersey’s highways".
(But it has to be so, because it is logical. Completion of tunnel permitted 2000 cars to pass, not the highways)
It meanss, that A and D are out.
(Moreover: "and" after "hour" in A makes the sentence wrong. There is no clause in this case. We must not put "and" here.)
2. The problem same problem (no clause) is in B. Look at the sentence before ", it"
The completion in 1925 of the Holland Tunnel, linking Manhattan with New Jersey’s highways and permitting 2,000 cars to pass through each tube every hour - there is no verb here - it is wrong.
was hailed as the decade’s $48 million engineering masterpiece - independent clause.
So B is out.
3. E is out too because of the same problem
The completion in 1925 of the Holland Tunnel
linked Manhattan with New Jersey’s highways, permitting 2,000 cars to pass through each tube every hour
was hailed as the decade’s $48 million engineering masterpiece.
"Linked" and then "was hiled" - it is not the sentence. No clause.
4. C is good.
linking, permitting - parallel. No problems with the clause.