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An ideal fluid is flowing down a pipe whose cross-section is shown below.
Suzanne Taylor. Created for Albert.io. Copyright 2016
Rank the fluid flow speeds at the positions shown from the position with the fastest speed to the position with the slowest speed.
C > D > B > A
C = D > B > A
C > D = B > A
A > B > D > C
A = B = C = D