I believe the last answer is correct because this will enable you to measure in percentages the accuracy in order to decide when the accuracy increased.
Answer:
6) test principle, data analysis, and example
7) cos mosquitos aren't going around the streets doing dirty work with the local bums
(when a mosquito bites you, saliva is injected into you, so HIV positive blood that a mosquito may have collected previously is not given to you!)
