Which of the Following Is a Major Difference Between a "Continuous

Which of the following is a major difference between a "continuous ordinal variable" and a "collapsed ordinal variable"?

A) Only continuous ordinal variables can be used in a bivariate table.
B) Only collapsed ordinal variables can have measures of association calculated.
C) Collapsed ordinal variables have fewer categories and can apply a greater number of measures of association than continuous ordinal variables.
D) Continuous ordinal variables use pairs of respondents in the calculation of association, whereas collapsed ordinal variables use chi square based statistics.