The Following Questions Focus on Conjoint Measurement

The following questions focus on Conjoint Measurement:
-Which of the following is NOT a reason for the increasing popularity of the paired comparison approach to determining attribute combinations in a conjoint analysis?

A) The paired comparison approach works well with computer?interactive interviewing procedures.
B) The paired comparison approach allows the researcher to check respondents' consistency in their judgment of alternatives.
C) The paired comparison approach, although a more difficult task for respondents than the full profile approach, is considerably more thorough.
D) All of the above are reasons.
E) b and c only are NOT reasons