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To solve this problem, we need to find a common denominator for the fractions 2/7 and 3/5.
The common denominator for 7 and 5 is 35.
Now, we can rewrite the fractions with the common denominator:
2/7 * 5/5 = 10/35
3/5 * 7/7 = 21/35
Now, add the fractions together:
10/35 + 21/35 = 31/35
So, the answer is 31/35. None of the answer choices provided match this result.