C or B, sorry im not 100%
I'm pretty sure the answer is: primary sources.
Answer:
Advantages of tissue valves compared to mechanical valves include the avoidance of lifelong warfarin therapy to prevent the development of blood clots. A disadvantage is their relatively poor durability compared to mechanical valves, with many requiring a re-operation in 10 to 20 years.
The greatest concern whenever a state was admitted to the Union was always whether it would be a slave state or a free state.
Slavery was a major issue.
Answer:So Hudson turned to the Dutch. He went to Amsterdam, and was commissioned by the Dutch East India Company in 1609 to find a Northeast passage to Asia. He sailed from Holland aboard the ship Half Moon
