Which labeled diagram of a pair of waves would demonstrate the greatest constructive interference?

a) a
b) b
c) c
d) d

it should be a. song dynasty’s civil service examination system created an administrative bureaucracy manned by the landed aristocracy.

very positive impact on our industries in the west, sine they promoted settlement and increased the ways in which goods could be transported to market.  

the structure was most likely used for;

c. playing a ball game with stone hoops