The Authors Present a Comparison of Correlation Coefficients Between Major

The authors present a comparison of correlation coefficients between major global equity markets over a variety of different periods. The comparison yields a number of conclusions listed here EXCEPT:

A) the correlation between equity markets for the full twentieth century shows quite low levels of correlation between some of the largest markets (close to 0.50 in some cases) .
B) that same century of data, however, yields a high correlation between the U.S. and Canada (0.80) .
C) the correlation coefficients between those same equity markets for selected sub periods over the last quarter of the twentieth century, however, show significantly different correlation coefficients.
D) None of the answers listed are inaccurate conclusions.