Final answer:
The explicit challenge not mentioned as facing psychologists in the study of thought and behavior is the Lack of technological tools. Discussed challenges include ethical concerns, replicability issues, and cultural diversity.
Step-by-step explanation:
The challenge mentioned in the text that is NOT facing psychologists in the study of thought and behavior is C) Lack of technological tools. The mentioned challenges in the provided materials include ethical concerns, which are addressed in discussions about the importance of informed consent and the oversight of Institutional Review Boards (IRBs), and issues of replicability, emphasizing the necessity for research findings to be verifiable by other psychologists through replication. In addition, the issue of managing cultural diversity is highlighted as a significant challenge for sociologists and, by extension, for psychologists who deal with cross-cultural studies. The provided texts also discuss the importance of ethical concerns regarding genome sequencing, further demonstrating the emphasis on ethical considerations in psychological research. However, the materials do not list a lack of technological tools as a challenge.