A 600mL sample of a 0.100M tormato buffer, pH3.75, is troatod with 6mL of 1.00M KOH. What is tho pH following this addition? (pK, for formic acid is 3.75) Express your answer to two decimal places.

A) 3.85
B) 3.95
C) 4.05
D) 4.15