To determine which length of yarn Hilary could use, we need to find a length that is at least 0.876 of a yard.
Let's evaluate the options:
A. 0.886 of a yard - This is greater than 0.876. B. 0.787 of a yard - This is less than 0.876. C. 0.799 of a yard - This is less than 0.876. D. 0.866 of a yard - This is less than 0.876.
The only option that meets the requirement of being at least 0.876 of a yard is:
A. 0.886 of a yard.