When 2 background colors B1 and B2 are mixed with foreground color F, the resulting pixel color P is

When 2 background colors B1 and B2 are mixed with foreground color F,

1.	When 2 background colors B1 and B2 are mixed with foreground color F, the resulting pixel color P is
A.	P=t0F+t1B1+(1-t0-t1)B2
B.	P=t0F-t1B1+(1-t0-t1)B2
C.	P=t0F+t1B1+(1+t0+t1)B2
D.	Only a
Answer» D. Only a