During the cenozoic era, this animal group greatly increased in number.
a. insects
c. mammals
b. reptiles
d. fish

The answer is “mammals” which is given at letter C. This is because many animals became extinct during this time, which helped the number of mammals increase. The word “Cenozoic” came from Greek words which mean “new life”. This is the era that we are in right now, and this started 66 million years ago. 

- three-quarters or two-thirds..

- "the constitution provides that an amendment may be proposed either by the congress with a two-thirds majority vote in both the house of representatives and the senate or by a constitutional convention called for by two-thirds of the state legislatures."

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health care plans in the united states having high costs because they are focusing on providing quality programs for different groups of individuals. the quality of the service is based on money flow received from the members. without this investment, couldn't be possible a constant scientific searching to prevent death and illness caused because of low levels of health investigation. currently, the complaints are not about the highest cost, but about the coverage and benefits to access the necessary health services required by the members.  

besides, if a global health system is established the quality levels will fall down because of the standardized of the health. the access to care will increase but the quality will be low because it depends on the money invested.