Concerns about public health led to the construction between 1876 and 1904 of three separate sewer systems to serve metropolitan Boston
(b) Concerns about public health have led to the construction of three separate sewer systems between 1876 and 1904 to serve
(c) Concerns about public health have led between 1876 and 1904 to the construction of three separate sewer systems for serving
(d) There were concerns about public health leading to the construction between 18776 and 1903 of three separate sewer systems serving
(e) There were concerns leading between 1876 and 1904 to the construction of three separate sewer systems for serving
Yes A is correct because of misplaced modifiers
and verb tense reasons
D and E are out. D b/c this sentence tells you that the occurrence (leading) happened in the past (b/n 1876 and 1903) so leading
should be led
instead (Same reason for eliminating E as well).
E can also be eliminated b/c a clearer sentence can be created when "leading" is placed closer to the phrase "to the construction of three separate sewer systems". Not to say that the verb tense leading
is correct, by the way.
C is out b/c have led
is not the correct verb tense that should be used here. You are trying to convey that that action happened and ended in the past, no that it continues to the present.
SO you must use led
. For that same reason you can eliminate B.
Thank you for your kudoses Everyone!!!
"It always seems impossible until its done."