Alaboring client who is positive for group b streptococcus is given an initial dose of ampicillin (omipen) 2 g at 9 am. according to established guidelines for intrapartum management of this client, the next dose should be: . 2 g given at 10 am2. 1 g given at 11 am3. 2 g given at noon4. 1 g given at 1 pm