Water (H2O) and hydrogen peroxide (H2O2) are both clear liquids. Which description most accurately describes the relationship between water and hydrogen peroxide? A.
They are two different elements.

B.
They are two different compounds that include different elements.

C.
They are two different compounds that include the same elements in different arrangements.

D.
They are two different mixtures that include the same elements in different arrangements.

The answer to this question is C.

Explanation:

Hydrogen peroxide is a chemical compound with the formula H₂O₂. In its pure form, it is a very pale blue liquid, slightly more viscous than water. It is used as an oxidizer, bleaching agent, and antiseptic. Concentrated hydrogen peroxide, or "high-test peroxide", is a reactive oxygen species and has been used as a propellant in rocketry. Its chemistry is dominated by the nature of its unstable peroxide bond.

Chemical formula: H2O2

Density: 1.45 g/cm³

Boiling point: 302.36°F (150.20°C)

Average Molar mass: 34.01 g/mol

Melting point: 31.23°F (-0.43°C)

Legal status: Over-the-counter drug · Not evaluated by FDA

Water is an inorganic, transparent, tasteless, odorless, and nearly colorless chemical substance, which is the main constituent of Earth's hydrosphere and the fluids of all known living organisms. It is vital for all known forms of life, even though it provides no calories or organic nutrients. Its chemical formula is H₂O, meaning that each of its molecules contains one oxygen and two hydrogen atoms, connected by covalent bonds. Two hydrogen atoms are attached to one oxygen atom at an angle of 104.45°.

Boiling point: 212°F (100°C)

Melting point: 32°F (0°C)

Chemical formula: H2O

Average Molar mass: 18.02 g/mol

IUPAC ID: Water

Hydrogen peroxide(wiki)

Water(wiki)

So probably C or D i dont know

Sorry if it is wrong

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.