The carbon dioxide cylinders of all fixed fire extinguishing systems shall be §retested and remarked whenever a cylinder remains in place §on a vessel for _____________. (small passenger vessel §regulations)

A
5 years from the latest test date stamped on the cylinder
B
7 years from the latest test date stamped on the cylinder
C
10 years from the latest test date stamped on the cylinder
D
12 years from the latest test date stamped on the cylinder
E