This topic examines legal common sense.
According to Article 127 of the Civil Code: "The inheritance is in the following order: (1) The first order: spouse, children and parents; (2) The second order: brothers and sisters, grandparents and grandparents. The children mentioned in this part include children born in wedlock, children born out of wedlock, adopted children and stepchildren with dependency. The parents mentioned in this part include biological parents, adoptive parents and step-parents with dependent relationship. Brothers and sisters referred to in this part include brothers and sisters of the same parents, half-brothers or half-brothers, adopted brothers and sisters, and stepbrothers and sisters with dependent relationships. " At the same time, according to the provisions of Article 129 of the Civil Code: "The widowed daughter-in-law who has fulfilled the main support obligation and the widowed son-in-law who has fulfilled the greatest support obligation are the first heirs." Item a is correct. Mr. Chen's wife Xia belongs to the first heir.
Item b is correct. Mr. Chen's adopted son Xiao Xia belongs to the first heir.
In mistake C, Mr. Chen's younger brother Xiao Chen belongs to the second heir.
In mistake D, Xiao Li, the wife of adopted son Xiao Xia, is not the heir. Item e is correct. Mr. Chen's son-in-law, Xiao Feng, has fulfilled his main obligation to support Mr. Chen, and is the first heir.
So the correct answer is Abe.