When the killer paramecia (K/K+ kappa particle) and sensitive Paramecium k/k) hybrid, if the bonding time is long, the result are

A、K/K(sensitive) and k/k (sensitive);

B、K/k+ kappa (killer) and K/k (sensitive);

C、K/K (sensitive) and k/k+ kappa (sensitive);

D、K/k+ kappa (killer) and
K/k+kappa (killer)