Tibetan rugs are so expensive because still pursues his art as they have > for centuries, by hand-dyeing all their wool and then knotting each thread individually to achieve a unique pattern for every piece . a>the weaver still pursues his art as they have. b>the weaver still pusues his art as he has. c>weavers still pursue their art as they have. d>weavers still pursue their art as was done. e>the weaver still pursues his art as has been done.