How does cocaine induce a sense of exhilaration? by decreasing the activity of the main excitatory neurotransmitter in the brain by producing a long but mild sense of euphoria by increasing the higher social regulatory functions of the cerebral cortex by increasing the availability of dopamine and serotonin in synapses?

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.