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Let's analyze the given information step by step:

1. A becomes third when arranged in descending order of weight from top.
2. E is between D and A.
3. C and D are not at the top.

From point 1, we know that A is not the heaviest since it's third from the top.

From point 2, we have two possibilities:
a. E is between D and A
b. A is between D and E

However, since A is already stated to be third from the top, option b is not possible. So, we proceed with option a.

From point 3, we know that C and D are not at the top. So, it implies that either B or E could be at the top.

Given that A is not the heaviest and C and D are not at the top, the order from top to bottom could be:

• B, E, D, A, C
• E, B, D, A, C

In both cases, C is second in descending order of weight.

So, the correct answer is (A) C.