What is the take off runway lengths for the CJ4 and the Gulfstream's.

A) CJ4: 4,000 feet; Gulfstream: 5,000 feet
B) CJ4: 5,000 feet; Gulfstream: 6,000 feet
C) CJ4: 6,000 feet; Gulfstream: 7,000 feet
D) CJ4: 7,000 feet; Gulfstream: 8,000 feet