The mixture of water vapor and smog can result in.

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:

The sun's parallax would be 180 degrees, greater than which you can't get.  so a. would be your anwser 

The figure is not necessarily a parallelogram because only one diagonal is bisected and only one pair of sides is congruent.

False. a cultural landscape is a "geographic area that includes cultural and natural resources associated with the interactions between nature and human behavior." : )