Under which condition is it most effective to use the Degree Heuristic in solving CSPs$?$

Select one:

When the CSP has a dense constraint graph, where many variables are interconnected by constraints.

When the problem involves a large number of variables, all with similar domain sizes.

When variables are mostly independent of each other with few constraints linking them.

When the problem requires that all variables must be selected simultaneously due to tight coupling between constraints.

When the variables have very large domains and the constraints are relatively simple and few.