Which of the following demonstrates that further teaching is required to prevent an infection related to being catheterized?

a. Encourage the client to attend a smoking cessation support group.
b. Discuss tapering the number of cigarettes smoked daily.
c. Write a MATLAB function called rootₙr that finds the root of a function using the Newton-Raphson method.
d. A randomized controlled trial to compare intensive management versus standard care in early psoriatic arthritis.