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The management at True Ink had a problem because the employee productivity was low. To solve this problem, the management first introduced productivity$-$based incentives and then it trained the employees to perform better. When the problem was not solved, the management realized that job rotation would drive the employees to perform better. In the context of strategies for increasing creativity in problem solving, this method of working toward a solution would be referred to as

a$.$ parallel thinking.

b$.$ lateral thinking.

c$.$ divergent thinking.

d$.$ convergent thinking.