Final answer:
For a client with multiple sex partners and history of pelvic infections, reversible methods such as hormonal implants or IUDs are suitable but must be paired with condoms for STI protection.
Step-by-step explanation:
A client with multiple sex partners and a history of pelvic infections would benefit from a temporary and effective method of contraception. Hormonal implants or Intrauterine devices (IUDs) could be suitable, as they are reversible and don't rely on compliance at the time of intercourse. However, it's essential to also note the importance of barrier methods such as condoms to protect against sexually transmitted infections (STIs), as neither hormonal implants nor IUDs provide STI protection. A nurse should emphasize the use of condoms along with any other selected contraceptive method for such a client.