In trying to solve the pendulum problem, concrete operational adolescents would be more likely than formal operational adolescents to ________.
A. test changes in string length and changes in weight simultaneously before testing them in isolation
B. identify relevant variables and test each one separately and, if necessary, also in combination
C. construct a hypothesis before conducting any tests of the speed with which the pendulum swings through its arc
D. consider potential alternative hypotheses after experimentation does not confirm an initial hypothesis
Answer: A
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