After teaching a male client about measures to maintain sexual health and prevent transmission of sexually transmitted infections (STIs), which client behavior indicates effective learning?
a) The client reports engaging in unprotected sexual intercourse with multiple partners.
b) The client expresses interest in learning more about STIs but does not follow through with recommended screenings.
c) The client consistently uses condoms during sexual activity and discusses the importance of regular STI testing with his partner.
d) The client avoids discussing sexual health topics and expresses discomfort with the provided information.