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Multiple Choice Question Consider this code: d = {'a': [1, 3], 'b': [5, 7, 9], 'c': [11]} Select the expression(s) that evaluate to 3. len(d) len(d['b']). len (d['a' + 'c']) len(d['a']) len(d) 3 len(d['a']) + len(d['c'])