Q1Single correct3 Marks10 May 2026

Consider the following Python function. ``` def f(s): D = {} for ch in s: D[ch] = D.get(ch, 0) + 1 best = None count = -1 for k in sorted(D): if D[k] > count: count = D[k] best = k return best print(f(s)) ``` Which of the following inputs s will produce the output 'b'?

A

s = 'abbaccaa'

B

s = 'bbcacacc'

C

s = 'aabbcc'

D

s = 'tbbbcaac'