Question:Determine whether the given conditions are sufficient to support the conclusion stated in the stem. Read conditions (1) and (2) and choose: A. Condition (1) is sufficient, but condition (2) is not sufficient. B. Condition (2) is sufficient, but condition (1) is not sufficient. C. Neither condition (1) nor condition (2) is sufficient individually, but together they are sufficient. D. Both condition (1) and condition (2) are sufficient. E. Neither condition (1) nor condition (2) is sufficient individually, and together they are also not sufficient. Problem: A, B, and C work together to process a batch of parts, and their work efficiencies are different from each other. It is known that the ratio of their work efficiencies is known, can the quantity of this batch of parts be determined? (1) The difference in the number of parts processed by A and B is known. (2) The sum of the number of parts processed by A and C is known.