After Reading a Journal Article on Political Liberalism,Tony Noticed That

After reading a journal article on political liberalism,Tony noticed that his data set contained the same items that the author had used to form a scale on political liberalism.So,Tony combined the items and applied them to his data.He was surprised when they did not form a scale.Confused,he asked you for an explanation.Which of the following statements is INCORRECT?

A) Items may scale in one sample but not another.
B) Do not assume that a given set of items form a scale because they scaled in an earlier study.
C) The combination of several data items resulting in a scale depends on the particular sample of observations under study.
D) He probably made a mistake and should recheck his calculations.
E) Items may scale in one sample but not another and therefore he should not assume that a given set of items form a scale because they scaled in an earlier study.