The Shell sort:

a. Finds the smallest value and exchanges it with the first value, then continues with the second value, third value, etc.
b. Is a system of comparisons and exchanges of adjacent elements to move the largest to the bottom of the selected group of values.
c. I s a system of comparisons and exchanges of elements that are non-adjacent. The gap is halved at each pass.
d. None of the above.

c. I s a system of comparisons and exchanges of elements that are non-adjacent. The gap is halved at each pass.