The Panama land bridge connecting Central America to South America has existed A. For less than one million years
B. For about two million years
C. Since the first inhabitants arrived in North America
D. Since the first inhabitants arrived in South America

The answer is B for about two million years

Explanation: The land bridge between Panama and Colombia has existed for only about 2 million years. This means that plant and animal life in North America, Central America, and South America developed separately for some time before they became one geographic unit

for starters, there is the structural trend of rising primary government expenditure as a share of gdp, which reached 36% in 2014, up from 22% in 1991. this increase reflected a political desire to address the poverty and inequality that had gone unaddressed during previous decades. to support the increase, brazil’s government increased taxes on consumption and promoted progress toward labor-market formalization. nonetheless, public investment, particularly in infrastructure, took a hit. in fact, with the exception of the 2005-2008 period, total investment as a share of gdp has remained below 20% since 1991.

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