Final answer:
A data invariant is indeed a set of conditions that holds true during the execution of any function, such as keeping a sorted list in order after any manipulation.
Step-by-step explanation:
The statement that a data invariant is a set of conditions that are true during the execution of any function is True. A data invariant is a property or rule that holds for a data structure and is assumed to be true during the execution of a program, or during some portion of the program's execution. For instance, in a sorted list, an invariant would be that the list elements are always sorted in a specified order. Whenever a function is executed that manipulates this list, the sorting order should be maintained, thus preserving the invariant.