A is the answer. The Supreme Court can rule laws and regulations unconstitutional.
Thomas Jefferson was hesitant to buy the Louisiana territory because it was against the constitution and because it cost lots of money.
I believe the answer is: Euclid and Pythagoras.
Euclid alexandria was a famous mathematicians who is regarded as the father of Geometry and phytagoras was known for developing the phytagoras formula to measures sides of triangles. Their accomplishments were really crucial because it is still used to calculate correct measurement in modern day architecture and engineering.
It represents our soldiers who fought for us and risked their lives
