The ellipse `x^2+""4y^2=""4`
is inscribed
in a rectangle aligned with the coordinate axes, which in turn is inscribed
in another ellipse that passes through the point (4, 0). Then the equation of
the ellipse is
(1) `x^2+""16 y^2=""16`
(2) `x^2+""12 y^2=""16`
(3) `4x^2+""48 y^2=""48`
(4) `4x^2+""64 y^2=""48`
A. `x^2+16y^2=16`
B. `x^2+12y^2=16`
C. `4x^2+48y^2=48`
D. `4x^2+64y^2=48`
