18.Which of the following conditions MOST strongly shifts λ phage infection toward lysogeny rather than the lytic cycle? (A) Early accumulation of Cro inhibits repressor CI synthesis. (B) Efficient early antitermination enables stable activation of repressor CI synthesis. (C) Rapid degradation of CII prevents repressor CI synthesis. (D) High Cro levels enhance repressor CI expression by blocking operator binding. (E) Repressor CI synthesis relies solely on maintenance promoters due to failure of initial activation.