In a circle, chords $AB$ and $CD$ intersect externally at point $P$ when produced. If $AB = 5\text{ cm}$, $BP = 3\text{ cm}$, and $DP = 2\text{ cm}$, find the length of chord $CD$.
Options:
- A: 10 cm
- B: 8 cm
- C: 12 cm
- D: 6 cm
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