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单选题
A body can only be observed at lower transit when（）.
A
the declination is the opposite name to the latitude
B
the algebraic sum of the colatitude and declination exceeds 90
C
the observer is in high latitudes above either polar circle
D
the body is circumpolar
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单选题A body can only be observed at lower transit when（）.A
the declination is the opposite name to the latitudeB
the algebraic sum of the colatitude and declination exceeds 90C
the observer is in high latitudes above either polar circleD
the body is circumpolar
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she can be observed by radarB
she can be observed visually from the other vesselC
she can be plotted on radar well enough to determine her headingD
her fog signal can be heard
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