Which of the following best describes the author's attitude toward the increasing amount of carbon dioxide in the atmosphere and its consequences

A．The exercise is the secret to permanent and successful weight control.
B．Combining exercises with a reduced-calorie diet makes it easier to lose weight.
C．Healthy weight control means losing primarily fat, not muscle or water.
D．Eat less and skip the exercise is an easy and effective way of losing weight.

A．stop illegal replanting of seeds in the developing countries
B．protect their intellectual-property fights
C．biologically carry out the agreements with the farmers
D．make all plants sterilized