Adding Two Fractions

What is $\dfrac{3}{5} + \dfrac{5}{7}$?
A. $\dfrac{81}{35}$
B. $\dfrac{46}{35}$
C. $\dfrac{4}{3}$
D. $1$
E. $\dfrac{2}{3}$
  

Test 21

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Test 20

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