The nurse attaches a pulse oximeter to a client's finger and obtains an oxygen saturation reading of 91%. Which assessment finding most likely contributes to this reading?

A. Capillary refill time is 2 seconds is within the normal range and is unlikely to interfere with the pulse oximeter reading. B. 2+ edema of fingers and hands most likely contributes to the low oxygen saturation reading. Edema can impair the accuracy of a pulse oximeter by affecting the transmission of light through the tissues, leading to erroneous readings. C. Blood pressure is 142/88 mm Hg is mildly elevated but does not directly affect the pulse oximeter's ability to measure oxygen saturation. D. Radial pulse volume is 3+ indicates a strong pulse and does not interfere with the functionality of the pulse oximeter.