A 30 m vertical column of fluid (density 1878 kg/m3 ) is located where g= 9.65 m/s2

A.  already in the circle/roundabout

Explanation:

At an intersection where there is no stop sign or traffic signal (with the exception of roundabouts), drivers must yield to vehicles coming from the right.

When approaching a roundabout intersection, always yield to traffic in the circle and pedestrians in the crosswalks. Wait for a gap in traffic before entering.