Which of these factors would the environment?
a. betty drinks only bottled water instead of soda.
b. greg changes all of the light bulbs in the office to energy efficient bulbs.
c. john keeps his off topic conversations down to 10 minutes a day.
d. doug turns the air conditioning down to cool the office during the hot summer months.

The answer is actually B.

The factor that would help the environment is:

B. Greg changes all of the light bulbs in the office to energy efficient bulbs.

Energy efficient bulbs consume less energy than regular bulbs and therefore less natural resources are needed. This would be helping the environment by reducing: the consumption of natural resources and the environmental harm, that is done in order to extract these resources.

Drinking only bottled water instead of soda would be beneficial for Betty's health however using more plastic is harmful for the environment.

Johns actions have no effect on the environment whatsoever.

Doug use of air conditioning is not beneficial, but rather harmful to the environment.

for your question the answer would have to be france