Look at the pedigree chart below, which shows inheritance of a certain disease.

A pedigree chart showing a male square half filled is connected to a female circle that is half filled in. Below them are four offspring, a male square that is completely filled in, one female circle that is not fiiled in, a female circle that is half filled in, and a male sqaure that is completely filled in

What percentage of offspring will be carriers only but will not have the disease? (1 point)

a
0%

b
25%

c
50%

d
100%