Vanessa claims that she sleeps better when she falls asleep to music. she has a comparison group, because she has noticed that she does not listen to music every night, only when she remembers to plug in her ipod. she typically remembers her ipod on nights when she is able to finish studying earlier. what problem do you see in vanessa’s reasoning about sleeping better to music?
a. vanessa may be sleeping better because she is less distracted by studying/going to bed sooner.
b. vanessa’s belief that she sleeps better with music is not falsifiable.
c. vanessa is biased because she sleeps in the same bed every night.
d. vanessa cannot make the claim about sleeping better to music because she has not asked a psychologist.
e. there is no problem with vanessa’s reasoning.

A92-year-old man with a 45-year history of chronic obstructive pulmonary disease is intubated in the icu because of a bout of viral pneumonia that fails to improve after 72 hours of antibiotics. although the inspired fraction of oxygen is 100%, the patient's po2 remains at 57 mmhg. positive-end expiratory pressure (peep) is added to allow the inspired fraction of oxygen. twelve hours after the introduction of peep the patient suddenly become hypotensive. at the same time, his oxygen saturation drops from 92% to 61%. on physical examination, his bp is 80/50 mmhg and his pulse is 124/min. he has distended neck veins and distant heart sounds. which of the following would also most likely be seen on this patient's physical examination? - absence of breath sounds in the right hemithorax- high amplitude carotid artery upstroke- a pleural friction rub- pulsus alternans- splenomegaly