The choices can be found elsewhere and as follows:
A- All children of a male autosomal carrier will express the disorder.
B- All children of a female autosomal carrier will express the disorder.
C- All carriers of sex-linked disorders are females who do not express the disorder.
D- All carriers of autosomal disorders are females who do not express the disorder.
I think the correct answer is option C. All carriers of sex-linked disorders are females who do not express the disorder explains the difference of those terms. Hope this helps.