On a fishing trip, Ed realizes that he has mistakenly packed the sewing box instead of the tackle box. He wants to fish but returns home because he does not have any line or hooks. Ed's failure to realize that sewing thread can be used as fishing line and that a bent needle can be used as a hook is an example of poor problem representation poor problem representation A cognitive accommodation cognitive accommodation B backward masking backward masking C functional fixedness functional fixedness D proactive interference