Using blue colored plates . I think ...
Answer:
a technique that uses specific antibodies to visualize features of cells
A.) staying free of disease (physical)
B.) reflecting about yourself (mental)
C.) getting 8-10 hours of sleep each night (physical)
D.) engaging in 30-60 minutes of physical activity every day (physical)
Since B is a mental activity...
The answer = B. reflecting about yourself
Good Luck!
You answered it. It says a=5