Optics and Gravity i know i got this one right
Samuel Adams was a Founding Father of the United States and a political theorist who protested British taxation without representation, uniting the American colonies in the fight for independence during the Revolutionary War.
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The answer is c and very must so be c
Marco Polo is very well known for his travels on this silk road as well as his 24-year journey to Asia. Throughout this time he became very well acquainted with the people he encountered and became a confidant of Kublai Khan. Since Kublai Khan was the Khagan of the Mongol Empire this allowed Marco polo to fit in better.
A new concept that became popular with department stores was using credit cards, and buying on credit: it allowed the users t posses good they cannot afford and on the other hand gave more revenue to the shops and they could charge interest.
