[单选题]
3. Which of the following is the b146t7 hrn+ 45ajpmiqdn. c nsrest descripti)v0szz hsi8i 8on of the relationship between the virus and ho 8ih)8izsvzs 0st organism?
A. Facultative parasitism.
B. Obligate symbiont
C. Predator-prey.
D. Obligate parasitism.
