The correct option is D. Thermophiles and Hyper thermophiles would be the bacterias whose enzymes would not function at 12 degrees celsius.
Explanation:
A thermophile is an organism that is acquired to live in raised temperatures and heated environments. These organisms can survive in a temperature range between 41 degrees Celsius to 121 degrees Celsius.
An hyper thermophile is an organism that is adapted to live in even more extreme heat conditions then the thermophiles.
These organisms cannot stand cold conditions and hence their enzymes would not function at 12 degrees celsius.
