Hello!
Redundancy of language means when something is repeated more than once in a sentence.
1. The answer cannot be A because "wily" is a synonym of "clever". The sentence is therefore saying: "The clever, clever con artist..."
2. The answer is B because "wily" and "smiling" are two different words with different meaning. Nothing is repeated in this sentence.
3. The answer cannot be C because "grinning" and "smiling are synonyms.
4. The answer also cannot be D because "smart" and "intelligent" are synonyms.
I hope this helps you! Have a lovely day!
- Mal