Someone please help..it’s has choices

Ineed with my science work! it’s due tomorrow!

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.