A line segment has an endpoint at (-1,-7). If the midpoint of the line segment is (3,-3), what are the coordinates of the point at the other end of the line segment

The investiture controversy began as a power struggle between pope gregory vii (1072–85) and henry iv, holy roman emperor (1056–1106).[2] a brief but significant struggle over investiture also occurred between henry i of england and pope paschal ii in the years 1103 to 1107, and the issue played a minor role in the struggles between church and state in france, as well.by undercutting the imperial power established by the salian emperors, the controversy led to nearly 50 years of civil war in germany, and the triumph of the great dukes and abbots. imperial power was finally re-established under the hohenstaufen dynasty. historian norman cantor:

Dall of the above all of the choices make sense

Ice melting no wait thats global warming

Ithink the answer  is d. tourism.hope this ☺☺