I think the it is B hope that helps
Answer:
The life of our early ancestors were very complicated.
Explanation:
The life of our early ancestors were very complicated because they used to live in a cage . They use to hunt wild animals and eat them. They went to search the food all around. They use to move from one place to another for their settlement.
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D support a hypothesis
A conclusion in scientific research summarizes the results obtained from the data of the experiments conducted which can be in support of the hypothesis or can be contradictory to the hypothesis. A conclusion could be defined as summing up of the arguments to draw inferences from the research conducted however pointing null hypothesis is also very important because both accept, and rejection of null hypothesis provides very useful information