Which of the Following Statements Comparing Open and Globular Star

Which of the following statements comparing open and globular star clusters is not true?

A) Open and globular clusters each typically contain a few hundred stars.
B) Open clusters are found only in the disk of the galaxy while globular clusters may be found both in the disk and the halo of the galaxy.
C) Stars in open clusters are relatively young while stars in globular clusters are very old.
D) For both open and globular clusters, we can assume that all the stars in a particular cluster are about the same age.