The gyrfalcon, an Arctic bird of prey, has survived a close brush with extinction; its numbers are now five times greater than when the use of DDT was sharply restricted in the early 1970's.

• Aextinction; its numbers are now five times greater than  
• Bextinction; its numbers are now five times more than  
• Cextinction, their numbers now fivefold what they were  
• Dextinction, now with fivefold the numbers they had  
• Eextinction, now with numbers five times greater than