Brainliest 25 pts

upper portions of the grand canyon show undisturbed horizontal layers of sedimentary rock.
which of steno's principles explain this?

a. principle of lateral continuity

b. principle of superposition

c. principle of original verticality

d. principle of original horizontality

Jenny places a strip of ph paper into a solution. when she removes the ph paper, it has turned yellow-green. what should jenny do next to determine the ph of her solution? a. use a different testing method because the ph paper should not change colors b. place the ph paper into a machine that reads the ph of the solution c. compare the ph paper's color with the color of ph paper from another solution d. compare the ph paper's color with a chart of colors and ph ranges