Which is a true statement comparing the graphs of x^2/6^2-y^2/8^2=1 and x^2/8^2-y^2/6^2=1? a. the foci of both graphs are the same points. b. the lengths of both transverse axes are the same. c. the directrices of x^2/6^2-y^2/8^2=1 are horizontal while the vertices x^2/8^2-y^2/6^2= 1 are vertical. d. the vertices of x^2/3^2-y^2/4^2=1 are on the y-axis while the vertices of y^2/3^2-x^2/4^2=1 are on the x-axis.