The first modern humans appeared on Earth about 200,000 years ago. Would it be possible to measure that number in terms of feet on the football field?

Exposed great deposits of coal and iron ore

The sun's parallax would be 180 degrees, greater than which you can't get.  so a. would be your anwser 

The us is first  the  u.s. economy  remains the  largest in the world  in terms of nominal  gdp. however, the  u.s. economy  loses its spot as the number one  economy  to china when  measured  in terms of  gdp  based on ppp. in these terms, china's  gdp  is $23.19 trillion exceeds the  u.s. gdp  of $19.42 trillion

Respiratory and cardiovascular diseaseor maybe your looking for the say 2.6 people die from