Trains into a metropolitan hub hold as many as five hundred passengers and, compared with most automotive forms of transportation, cost consumers less, are better for the environment, cause people less traffic headaches, and offer a much more relaxing travel experience.
(A) Trains into a metropolitan hub
hold as many as five hundred passengers and, compared with most automotive forms of transportation, cost consumers less, --------- hold is parallel with
cost and the rest of the sentence --------- CORRECT
(B) Trains into a metropolitan hub,
which hold as many as five hundred passengers, compared with most automotive forms of transportation,
they cost consumers less, ---- meaning error, seems like the hub is holding the passenger + meaning of they is unclear ----------------- INCORRECT
(C) Trains into a metropolitan hub hold as many as five hundred passengers,
in comparison with most automotive forms of transportation, and
have a lesser cost for consumers, they ---------- in comparison with: unnecessary, the later part of the sentence is not parallel e.g. “have a lesser cost for consumers” is awkwardly constructed. + the list after consumers starts with they which is not parallel with anything in non-underlined portion. ----------- INCORRECT
(D) Trains into a metropolitan hub,
holding as many as five hundred passengers, compared with most automotive forms of transportation, cost consumers less, ------ here we don’t know what “holding” is working as a verb for --- train or hub? --------- INCORRECT
(E) Trains into a metropolitan hub,
which hold as many as five hundred passengers, compared with most automotive forms of transportation the
cost to consumers is lower, and they --------- again “which holds” wrongly modifies the hub. Also, “…..the cost to consumer is lower, and they…” is not parallel with rest of the sentence. ------------- INCORRECT