Calculate the pH of a solution made by mixing 8.627 g of sodium butanoate in enough 0.452 M butanoic acid, HC₄H₇O₂, to make 250.0 mL of solution. K_a = 1.5 x 10^-5. 

• A. 4.82
• B. 4.98
• C. 5.85
• D. 4.66
• E. 4.06