根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。

    ____ The Center for Injury Research and Policy at Nationwide Children's Hospital in Ohio did the study. It was published in the American Journal of Preventative Medicine. The study found a sixty-three percent increase in the number of people treated for rock climbing injuries in American hospitals.

    The study said forty thousand people were treated in emergency rooms. ____ The ankle was the most common body part to be injured.

    ____ The average age was twenty-six. Fifty-six percent of the injuries were to people twenty to thirty-nine years old. Women made up twenty-nine percent of the injured population. That is more than that in past rock climbing studies.

    ____ But many people think it is worth it. John Bachar said rock climbing felt like being on another planet. Dean Fidelman says it is a continual challenge and a beautiful form of movement. And, for Sarah Bowman, she has just started her way up the rocks.

    Dean Fidelman said that he believes a climber's ego(自我价值感) can be his worst enemy on a rock. ____

A. Like many other sports, rock climbing can be dangerous.

B. Climbers in the study were from ages two to seventy-four.

C. The most common injuries were broken bones and sprains in legs and feet.

D. They try to move as silently up the wall as they can.

E. A recent study shows a sharp increase in rock climbing injuries between 1990 and 2007.

F. There's no other sport where you're really going up and down.

G. He said rock climbing is a high risk sport in which many people overestimate their abilities and underestimate the rock.