A telescope, when in normal adjustment, has a magnifying power of 6, and the objective and the eyepiece are 14 cm apart. The focal lengths of the eyepiece and the objective, respectively, are:

A. Eyepiece: 2 cm, Objective: 84 cm
B. Eyepiece: 7 cm, Objective: 21 cm
C. Eyepiece: 14 cm, Objective: 70 cm