Select the correct answer. Which activity provides the greatest reduction to the risk of disease-causing pathogens?

A. Laundering with cold water
B. Dusting
C. Mopping the floor with water and disinfectant
D. Polishing furniture
E. Sorting laundry

During crossing-over, a. genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles. b. nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. c. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles. d. sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. e. genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.