Company R’s annual profit has increased by a constant amount each calendar year since 1985. What was Company R’s annual profit in 1991 ?()
(1)In 1985 Company R’s annual profit was $212.000; in 1989 Company R’s annual profit was $242,000.
(2)Company R’s annual profit has increased by $7,500 each year since 1985.
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.