A researcher is testing a new calcium supplement reported to increase bone mass in pregnant women. Two populations of subjects are used: a group of pregnant women taking the calcium supplement and a group of pregnant women who do not take the supplement. The group not taking the supplement is called the:

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explanation:

explanation:

1)drink water

2)try concentrating on what u r doing to distract urself from the headache and manipulate ur brain

3)go to sleep.its an easier yet time consuming way

4) massage ur temple and head

probably since the potency of the cocaine, not a lot, but i've never done any research on cocaine so i wouldn't know, but i would also guess it would determine on the gap between sniffs or if you did it all at once, so i really don't know.