A nurse is preparing to administer a rectal suppository to a client. In which of the following positions should the nurse place the client for insertion of the suppository?

The correct answer is B: Sim's position. In Sim's position, the client lies on the left side with the upper leg flexed, which provides easy access for rectal suppository insertion. This position helps relax the client's anal sphincter and makes insertion more comfortable and effective. Placing the client in the prone position (A) would make it difficult to access the rectum. Lying on the right side (C) is not ideal for rectal suppository insertion as it may cause discomfort. Supine position (D) is not suitable for this procedure as it does not facilitate proper access to the rectum.