This is a multiselect question, at least one answer is correct, but select ALL of the correct answers

A$.$ A major factor for developing greater accuracy for project cost estimates is to cost the project on key major deliverables vs WP$\text{'}$s

B$.$ Using $$500$ US dollars per cubic meter would be an example of a parametric estimate

C$.$ A homeowner changing the quality of items in their new house after the started, like the quality of the granite and wood would be an example of specification change problems with cost estimations estimations