In ptolemy's model, how do the epicycles of mercury and venus differ from those of mars, jupiter, and saturn?
a. the epicycles of mercury and venus were perfect circles.
b. the epicycles of mars, jupiter, and saturn were elliptical.
c. the epicycles of mercury and venus were identical to the epicycles of mars, jupiter, and saturn in ptolemy's model.
d. the epicycles of mercury and venus were attached to a line joining earth and the sun.
e. the epicycles of mars, jupiter, and saturn revolved around earth independently of the sun.
f. the epicycles of mercury and venus revolved around earth independently of the sun.
g. the epicycles of mars, jupiter, and saturn were attached to a line joining earth and the sun.