An independent variable is a.
directly changed by the experimenter.
b.
manipulated by changes to the dependent variable.
c.
a variable that is kept constant.
d.
a variable that is used as a control

social act if im thinking of the right thing

explanation:

know it

the  seven  days  battles  were  a series of seven battles over seven  days from june 25 to july 1, 1862, near richmond, virginia,  during  the american civil war. the  seven  days ended with mcclellan's army in relative safety next to the james river, having suffered almost 16,000 casualtiesduring  the retreat.

eleanor roosevelt

his husband tremodulny   by adding propserity and being serious about thingds aswell such as with the new deal one of the best first ladies out there was eleanor