Answer:
D: a trait with a dominant and recessive allele!
"Diem began policies that were oppressive to Buddhists" is the one among the following choices given in the question that <span>caused protests in South Vietnam during the presidency of Ngo Dinh Diem. The correct option among all the options that are given in the question is the second option or option "B".</span>
Typically you use experimental and control groups in an experiment. a control group is like the default, and the experimental is the one you actually experiment with.
for example if i run an experiment on the effects of food dye on a leaf stem, i’ll have my control group (the ones without food dye) to compare to the experimental group (the ones with food dye)
the control group is a way for scientists to see how an experiment truly affected or altered the subject
Your answer would be c. because sometimes you have to collect data. hope that helped