Which of the Following Is True of Research on Insight

Multiple Choice

Which of the following is true of research on insight?

A) Researchers have proven that all creatures, even one-celled organisms such as the amoeba, are capable of insight learning.
B) Researchers have found that only human beings are capable of insight learning.
C) Researchers have found that under proper circumstances even lower animals, such as pigeons, are capable of insight learning.
D) Researchers have found that only higher animals, such as humans and apes, are capable of insight learning.