What is true of the population shown in this graph?

the population has increased until it has reached its carrying capacity.

there are no limiting factors to control population growth.

the number of individuals will eventually drop to zero.

it shows the effect of overpopulation on a species.

In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.