Python:

Choose the correct statements that count the frequency (number of occurrences) of each letter in the given string s.

s = 'ccaefeedacdbebacacaaaaeecafddbdfefddefcaedafaacaacfceaedcfddcdeaefeeffdfeadfdefaaeaddeacfbadebaaaaad' d={}

• for ch in s: d[ch] += 1 # A
• for ch in s: d.setdefault(ch,0); d[ch] += 1 # B
• for ch in s: d[ch] = d.get(ch,0)+1 # C
• for ch in s: d.set(ch,0); d[ch] += 1 # D
• for ch in s: d[ch] = d.getdefault(ch,0)+1 # E

A

C

B

D

None is a correct answer.

E