Regarding the recently introduced lipid formulation of amphotericin B, which one of the following statements is accurate? (a) Affinity of amphotericin B for these lipids is greater than affinity for ergosterol (b) They are less expensive to use than conventional amphotericin B (c) They are more effective in fungal infections because they increase tissue uptake of amphotericin B (d) They may decrease nephrotoxicity of amphotericin B (e) They have wider spectrums of antifungal activity than conventional formulations of amphotericin B