In the Three-Dimensional Euclidean Space, the Graph Of $z = x ^ { 2 } + 4 y ^ { 2 }$

Multiple Choice

In the three-dimensional Euclidean space, the graph of $z = x ^ { 2 } + 4 y ^ { 2 }$ is

A) An elliptic cone
B) A hyperboloid of one sheet
C) A circular cylinder
D) A hyperboloid of two sheets
E) An elliptic paraboloid