Critical Reasoning

123. Museums that house Renaissance oil paintings
typically store them in environments that are carefully
kept within narrow margins of temperature and
humidity to inhibit any deterioration. Laboratory tests
have shown that the kind of oil paint used in these
paintings actually adjusts to climatic changes quite
well. If, as some museum directors believe, paint is
the most sensitive substance in these works,
then by relaxing the standards for temperature and
humidity control, museums can reduce energy
costs without risking damage to these paintings.
Museums would be rash to relax those standards,
however, since results of.preliminary tests indicate
that gesso, a compound routinelyused by Renaissance
artists to help paint adhere to the canvas, is unable to
withstand significant variations in humidity.
Inthe argument above, the two portions in boldface
play which of the following roles?
(A) The first is an objection that has been raised
against the position taken by the argument; the
second is the position taken by the argument.
(B) The first is the position taken by the argument;
the second is the position that the argument
calls into question.
(C) The first is a judgment that has been offered in
support of the position that the argument calls
into question; the second is a circumstance on
which that judgment is, in part, based.
(D) The first is a judgment that has been offered in
support of the position that the argument calls
into question; the second is that position.
(E) The first is a claim that the argument calls into
question; the second is the position taken by
the argument.

Hi All,
Can any body help me in solving boldface question, i get stuck with the terms used in the answer choices (judgment that has been offered in
support of the position that the argument calls
into question; the second is that position) , it would be great if little explanation can be given for the above options choices