Which of the following statements BEST explains how command economies have changed over time? A.
Command economies have failed immediately when attempted.
B.
Command economies have become more common since 1986.
C.
Command economies have experienced some success, but have declined economically.
D.
Command economies have completely succeeded each time they have been used.

Astudent sees several ants walking up a wall following the exact same trail that an ant took earlier. she wants to apply the scientific method to determine how the ants detected the trail. which of these steps would come first in her application of the scientific method? perform an experiment by cleaning the scent away from part of the trail. draw a conclusion that the ants follow a scent trail. make a prediction about what the ants will do after she cleans away part of the trail. hypothesize that the ants are following a scent trail that the first ant left.