What is the sidereal period used in Kepler's third law?
A. the time taken by the planet for one rotation around its axis
B. the time it takes for a planet to complete one orbit with respect to the background of fixed stars
C. the orbital period of a planet as it revolves around the Sun as observed from Earth
D. the time taken by the planet to transition from day to night
E. the time taken by the planet to travel from the aphelion to the perihelion

Kepler's third law relates the semi-major axis of the orbit to its sidereal period. The major axis is the total length of the long axis of the elliptical orbit (from perihelion to aphelion).

Explanation:

A and C

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answer: collecting information/data

reason: the student is going around and asking people questions to collect data

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hypoxemia refers to a below usual concentration of oxygen in the blood, mainly in the arteries. hypoxemia is an indication of an issue associated with circulation or breathing and may lead to various symptoms like shortness of breath.  

the condition is identified by determining the level of oxygen in the blood sample obtained from an artery. it can also be predicted by determining the oxygen saturation of the blood with the application of a pulse oximeter.  

the normal arterial oxygen is about 75 to 100 mm hg. the values underneath 60 mm hg is generally considered with the requirement for supplemental oxygen. the normal pulse oximeter readings generally range between 95 to 100 percent. the values under 90 percent are regarded as low.  

in the given case, the oxygen saturation is measured at 93 percent, hence, there is no need to administer oxygen, that is, one should withhold oxygen.