Authority? ( I probably shouldnt be answering this cause Im not sure, but I hope it helps. good luckk )
In 1750 the price of a cotton shirt was much higher because there was less efficient technology.
Answer:
caffeine.
Explanation:
When Xi consumed several cups of coffee to stay wake for another hour.Coffee contains caffeine.Since caffeine is psychoactive drug and it is legal also unlike other psychoactive drugs.You feel more energetic.It acts as a central nervous system stimulant and when it reaches the brain it causes alertness and you will feel more awake.But Xi consumed more than he needed hence he was not able to go to sleep.
