Final answer:
The author's point of view in this passage is that it is normal when a study's results do not turn out as expected.
Step-by-step explanation:
The author's point of view in this passage is Option B: It is normal when a study's results do not turn out as expected. The passage discusses the research by Jean Piaget on object permanence, which is controversial regarding the age it is achieved. This suggests that studies may not always have expected results, and it is normal to have conflicting findings in research.