(A) 条件(1)充分，但条件(2)不充分．
(B) 条件(2)充分，但条件(1)不充分．
(C) 条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．
(D) 条件(1)充分，条件(2)也充分．
(E) 条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．

At Company R, the average (arithmetic mean) age of executive employees is 54 years old and the average age of non-executive employees is 32 years old. What is the average age of all the employees at Company R
(1) There are 10 executive employees at Company R.
(2) The number of non-executive employees at Company R is four times the number of executive employees at Company R.