1-C. One of the earliest projects of this type is the Christmas Bird Count, started by the National Audubon Society in 1900.One of the earliest projects of this type is the Christmas Bird Count, started by the National Audubon Society in 1900.
2-C. Later, people in the United States started keeping them as household pets in the early 1900s.Later, people in the United States started keeping them as household pets in the early 1900s.
3-C. For instance, there is another report from the mid-1900s describing how the Maring people of New Guinea would hold dances to show their military strength and recruit allies for possible battles.For instance, there is another report from the mid-1900s describing how the Maring people of New Guinea would hold dances to show their military strength and recruit allies for possible battles.
4-C. An example comes from research conducted in the mid- 1900s on dances performed after hunts by the Mbuti Pygmies, an ethnic group living in parts of Central Africa.An example comes from research conducted in the mid- 1900s on dances performed after hunts by the Mbuti Pygmies, an ethnic group living in parts of Central Africa.