question 3\nscientific research: using human subjects is challenging due to all except:\nhumans have…

question 3\nscientific research: using human subjects is challenging due to all except:\nhumans have multiple variables that must be considered\nmany testing variable are not ethical for humans\nhumans are available and willing to participate and help the field develop\nhumans have to abide by the procedures of the study

question 3\nscientific research: using human subjects is challenging due to all except:\nhumans have multiple variables that must be considered\nmany testing variable are not ethical for humans\nhumans are available and willing to participate and help the field develop\nhumans have to abide by the procedures of the study

Answer

Brief Explanations:

When using human subjects in scientific research, having multiple variables to consider, ethical issues with testing variables, and ensuring humans abide by study procedures are challenges. However, humans being available and willing to participate is not a challenge but rather a positive factor.

Answer:

C. Humans are available and willing to participate and help the field develop