Sandra wants to improve her body composition. four of her friends have given her advice. analyze the sentences to determine which friend gave her the best piece of advice?
a.
sanchez told her to take diet pills and to eat less than 1,000 calories a day.
b.
john says to eat several, balanced, low-calorie meals throughout the day and to exercise regularly.
c.
laurie says to eat only fruits and vegetables and to exercise regularly.
d.
shelia told her to eat whatever she wants as long as she exercises five days a week for 60 minutes.

In 2009, a flu pandemic was believed to have originated when viral transmission occurred from pig to human, thereby earning the designation, "swine flu." although pigs are thought to have been the breeding ground for the 2009 virus, sequences from bird, pig, and human viruses were all found within this newly identified virus. what is the most likely explanation of why this virus contained sequences from bird, pig, and human viruses? a) the virus was descended from a common ancestor of bird, pig, and human flu viruses.b) the infected individuals happened to be infected with all three virus types.c) related viruses can undergo genetic recombination if the rna genomes mix and match during viral assembly.d) the human was likely infected with various bacterial strains that contained all three rna viruses.