The correct order to form a meaningful sentence is ACEDB. Part (A) comes first as it introduces the main subject of the sentence, which is the positive information regarding students. Part (C) connects the good news mentioned in part (A) to its cause, which is advancements in something. It specifies what the good news is related to (advancements). Part (E) specifies what the advancements (mentioned in the previous part) are related to (online learning). Accordingly, CE forms a necessary pair. Part (D) elaborates on the positive impact of advancements in online learning, namely providing greater access to educational resources and opportunities. Part (B) specifies one of the benefits resulting from the advancements in online learning mentioned in parts (C) and (D), which is the availability of self-paced learning. Hence, (c) is the correct answer.
The complete sentence is: The good news for students is that advancements in online learning have provided greater access to educational resources and opportunities for self-paced learning.