In a field experiment to observe altruistic behavior, an observer records the number of people who stopped to hold the door for a student on crutches. She reports that seven people volunteered to assist the young man, when in fact there were only five. She has made an error called.

Inaccurate observation

Explanation:

Altruistic behavior is the attitude and act of people that show selfless care and good will a person has for other people in terms of supporting them,proving care or help.

According to the question,observer has generated the error of inaccurate observation as she did not precisely noted and noticed the people who actually assisted the man.Thus, she gave incorrect report of seven helping people rather than five people.

answer is b shrapnel injuries