Which of the Following Are Direct Measures

Which of the following are direct measures?

A) The patient's radial pulse rate
B) The dimensions in centimeters of a decubitus ulcer
C) The nurse's observations of an infant's apparent pain
D) The physician's measure of the patient's deep tendon reflexes
E) The patient's estimate as to whether his lithium level is within therapeutic range
F) The mother's report of her toddler's anxiety level before a blood draw
G) The patient's serum serotonin levels