The Cambrian Period was the first geological period of the Paleozoic Era, which of the following characterizes the Cambrian period? Choose the correct answer. a
dinosaurs flourished, all life lived in the sea and humans appeared
b
invertebrates developed, all life lived in the sea, and ocean organisms with shells and outer skeletons developed
c
single-celled life, humans appeared, and dinosaurs flourished
d
dinosaurs flourished, multi-celled life appeared, and all life lived on land

Based on your knowledge of industrialization, which of the following statements best describes what is happening in this photo taken in the us around 1910? a. the children pictured here likely worked a 4 - 6-hour shift after school, five days a week, for minimum wage. b. the children pictured here are working illegally, as child labor was prohibited in the late 1880s. the children pictured here likely worked a 12-hour day, six days a week, for about one dollar a week d. the children pictured here likely earned good wages, were protected from risk of injury, and were likely to have a successful, long-term career in this industry.