Data for four mutually exclusive alternatives are given in the table below. Assume a life of 6 years and a MARR of 10%,

Alt.A Alt.B Alt.c Alt.D do nothing
Initial cost $560 $340 $120 $0
EUAB $140 $100 $40 $0
Salvage Value $40 $0 $0 $0

The ?B/?C ratio for the first increment, (C-D) is --- .
A.1.19
B.0.84
C.1.45
D.1.86