In an elliptic orbit around any planet, the location at which a spacecraft has the maximum angular velocity is
(A) apoapsis.
(B) periapsis.
(C) a point at $+45^{\circ}$ from periapsis.
(D) a point at $-90^{\circ}$ from apoapsis.
In an elliptic orbit around any planet, the location at which a spacecraft has the maximum angular velocity is
(A) apoapsis.
(B) periapsis.
(C) a point at $+45^{\circ}$ from periapsis.
(D) a point at $-90^{\circ}$ from apoapsis.