Which of the following is an important event that occurred during the mesozoic era? a) the first land plants appeared. b) pangaea broke up into the continents c) mammals went extinct at the end of this era. d) reptiles appeared on earth for the first time. i know for sure is not the answer.

answer; (wisconsin);

explanation: the badger state. this nickname originally referred to the lead miners, of the 1830s, who worked at the galena lead mines in illinois. these mines were in northwestern illinois close to the borders of wisconsin and iowa. the wisconsin miners lived, not in houses, but in temporary caves cut into the hillsides.