Select the dependent transition clause in the following passage: The group stood beneath the rock-climbing wall, looking nervously at the challenge before them. None of them had ever climbed before, and they were all wondering if their agility and strength were up to the demands of this adventure. When the instructor asked for volunteers, the smallest girl in the group boldly stepped forward. She said, "Now or never!" and waited to be buckled into her harness.
A) None of them had ever climbed before
B) waited to be buckled into her harness
C) When the instructor asked for volunteers
D) There is no dependent transition clause in the above passage
?