Which reaction occurs spontaneously?

• A. Cl2(g) + 2NaF(aq)--> F2(g) + 2NaCl(aq)
• B. I2(s) + 2NaF(aq)--> F2(g) + 2NaI(aq)
• C. Cl2(g) + 2NaBr(aq)-->Br2(l) + 2NaCl(aq)
• D. I2(s) + 2NaBr(aq)--> Br2(l) + 2NaI(aq)