Which of the following is a problem in a scientific experiment?

A. How do your pupils change as light changes?

B. The light was increased and the pupils shrunk by 2 mm.

C. Turn the lights off, measure the pupils, then turn the lights on and measure the pupils. Calculate the difference.

D. If you increase the light in a room, then your pupils will shrink.

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.

answer: d. load

a river's load refers to the natural phenomena in which the sediments, rocks   stones, boulders and other deposits are removed and picked from the bottom bed of the river due to the abrasion resulted by the high speed water current.