Density can be defined as the measure of mass of a substance per unit volume.
The answer to the question is A
<span>In physical cosmology, cosmic inflation, cosmological inflation, or just inflation, is a theory of exponential expansion of space in the early universe. The inflationary epoch lasted from 10−36 seconds after the conjectured Big Bang singularity to sometime between 10−33 and 10−32 seconds after the singularity.
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What do you mean? I'm confused... You need to put the rest of the question
