C is a general statement. General statements are mostly if not always the first in the sequence.
C ends with “success of their field” and D starts with “Those successes..”, this implies that D follows C.
D talks about “theoretical and practical success” and A is talking about the “theoretical success”.
This implies that A follows D.
B starts with “thus” which indicates that it is a conclusion. Therefore, it is the last in the sequence.
The order is CDAB.
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