Answer: A. We can see, feel and describe how the object is made.
Explanation: from the word extant, which means 'still in existence'. Extant costumes and artifacts are used to describe costumes and artifact which are still in existence. Extant costumes can be physically viewed, felt and described based on it's originality as one can still make hand's on review or assessment of the costume or artifact. This is different from extinct costumes which can only be read about in books or watched in documentaries without physical or hands-on assessment.