This question is from Odyssey and the answer is not all sedimentary rocks contain weathered rock and sediment. The correct answer is Stalagmites and stalactites are examples of chemical sedimentary rock, I know this because I had to answer the same question on Odyssey.
Answer:
a i just took the test. :)
They formed Gondwana.
They moved toward the poles.
dirtier water
B.
straighter
C.
wider
D.
more curves