What conditions must a domain D in the xy-plane satisfy to ensure that the value of the line integral

+

dy should depend only on the initial and terminal points of the path C that lies in D?
◦ D must not contain the point (1, -1).
◦ D must be simply connected and must contain the point (1, -1).
◦ D can be any domain in the xy-plane.
◦ D must be simply connected and not contain the point (1, -1).
◦ D must be connected and not contain the point (1, -1).