Answer:
C, and E
Explanation:
C and E are definite answers and A and B are definitely not. I suspect D isn't either but in one phase of the Korean war UN troops which were largely American pushed the North Koreans back across their own border. However I would stick with C and E.
<span><span>Rene Descartes is known
for the Cartesian coordinate system and the belief that mathematics can explain
all of nature. He is the father of analytical geometry (by using algebra
to describe geometry). We often relate to his Cartesian coordinate system in
maps or graphs to know how far along and how far up it is. </span>He
was also the one who invented the representation of unknowns in
mathematical equations by using x, y, and z, and then the
knowns by using a, b, and c<span>.</span></span>
Labor unions should be the answer
He grouped it with H, Li, Na, K, Rb, Cs, Fr.
I read somewhere that he also grouped it with copper, gold, and silver. (Metallic Elements).
Its the Longbow......its better than the crossbow..Hope it helps!
