Which of the following rollerblades are great for beginners? A. Skates that have five wheels and no brake

B. Skates that have four wheels in a line

C. Skates that have three wheels with a pick

D. Skates that have two sets of two wheels

Which of the following statements best describes an opportunistic infection (ol)? a. ols are common only to people with healthy immune systems b. ols are more frequent in the earlier stages of hiv c. ols are the common cause of death of people with hiv/aids d. ols can be deadly to perfectly healthy people.