On the first day of fighting at Gettysburg, the Union army
drove the Confederates out of Pennsylvania.
was forced into a defensive position.
had an easy victory against the Confederate army.
fought the Confederate army to a stand-off.

experiments.

surveys.

questionnaires.

interviews.

case studies.

participant and non-participant observation.

observational trials.

studies using the delphi method.

because he had a big bear belly

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the correct answer is :

{b.}   ( american workers lose job opportunities )

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    -sprinkles

answer; the three types of research;