yes, he is right the answer is,
Galileo's most important scientific contributions were in the field of physics. ... Using the telescope, Galileo discovered the mountains on the moon, the spots on the sun, and four moons of Jupiter. His discoveries provided the evidence to support the theory that the earth and other planets revolved around the sun.
A. Goods became cheaper and plentiful
All colonists are equal and desperate like the south and north.
C. If you wanted to keep going the order would be C, A, B, D.
