Answer:
black carbon which is "B"
Topography is the answer :)
Answer:
The invention of the marine chronometer by John Harrison in the middle of the 18th century made true ocean navigation possible. (1) Marine Chronometer In the early 18 th century, knowing your whereabouts on the face of the globe was difficult. As the world’s greatest global power, Britain was extremely keen to remedy that.
The strands are suppose to be exactly same when replication is complete, so you would not be able to tell the difference.
