i'm using Savvas Realize and everytime i try to open a chapter of the book, I receive this message. Can someone help me out? I signed in then out multiple times nothing's working.

Color blindedness is a sex-linked trait. if we could see the pedigree chart for several more generations of the family illustrated here, we would expect a) more males to be color blind. eliminate b) more females to be color blind. c) no females to ever be color blind. d) an equal number of males and females that are color blind.