Data Sufficiency

What is the value of ?, if ? represents a digit in the 8-digit number 23,957,?72?

(1) The sum of the 8 digits is equal to 5 times an integer (2) The missing digit is equal to one of the digits in the number.

Statement (1), BY ITSELF is sufficient to answer the question but statement (2) by itself is not sufficient to answer the question.

B - Statement (2), BY ITSELF is sufficient to answer the question but statement (1) by itself is not sufficient to answer the question.

C - BOTH statement (1) and (2) TOGETHER are sufficient to answer the question, but NEITHER statement BY ITSELF is sufficient to answer the question.

D - EACH statement BY ITSELF is sufficient to answer the question.

E - The two statements, even when taken TOGETHER, are NOT sufficient to answer the question.