To form a better telescope, you can interchange eyepieces for new focal lengths. a new design lets you replace both lenses, which new configuration would make a more powerful telescope?

a. a short focal length objective and a short focal length eyepiece.
b. a long focal length objective and a short focal length eyepiece.
c. a long focal length objective and a long focal length eyepiece.
d. a short focal length objective and a long focal length eyepiece.