What is the origin of the tradition of shaking hands?
a. to expel evil spirits
b. to show that neither party was holding a weapon
c. to signify sharing the breath of life
d. to make sure that neither party had a robotic hand

The answer is
B. To show neither party was carrying a weapon

The handshake dates back to Ancient Greece

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