Answer:The question is incomplete.
Below Is the complete question.
Which internal validity threat is suspected?
A college health center identifies lack of testicular self-examination among students and implements an intense summer wellness program focusing on the benefits of testicular self-examination. Afterward, a count indicates an increased number of students who do not complete testicular self-examinationsA. History
B. Maturation
C. Testing
D. Mortality
E. Selection bias
The correct answer is option D. Mortality.
Explanation:
Mortality is the internal validity threat that is suspected.
Testicular self-examination is a vital examination that is use to take note of changed that might be evident in the male external genitalia and to check/rule out the onset of any reproductive health disease/disorder.
Mortality/death might have been a proven threat on the awareness and program on self- testicular examination.
Students that aren't aware of testicular self-examination initially and might have underlying health conditions prior to the awareness might have lost their lives in the course of the program causing a decrease in the count of students who were able to complete the testicular self-examination.