When two solutions are combined a bright red precipitate is formed. Which is true of the precipitate?

Based on the context in paragraph 4, fossil refers to -
A how igneous rocks were formed over time
B the remains of dead plants and animals settle to the bottom of an
ocean or lake and are covered by mud
C a trace or print, or the remains of a plant or animal of a past age
preserved in earth or rock
D layers of sediment building up over time and pressing down. forming
rock

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True, the standard unit for volume is liters which can be represented by either a lower case "l" or a capital "l"