1. C. HIV is a virus it can be tansmitted through body fluids liks semen and blood and it causes AIDS. 2. D. 3.C. 4.B. 5.A. 6.B. Solution 1. C. HIV is a virus it can be tansmitted through body fluids liks semen and blood and it causes AIDS. 2. D. 3.C. 4.B. 5.A. 6.B..