The center spot of traditional products drifts _______ each year.
a. +0.7 performance, -0.7 size
b. +0.5 performance, -0.5 size
c. +0.9 performance, -0.9 size
d. +1.0 performance, -0.7 size
e. +0.7 performance, -1.0 size
a. +0.7 performance, -0.7 size
b. +0.5 performance, -0.5 size
c. +0.9 performance, -0.9 size
d. +1.0 performance, -0.7 size
e. +0.7 performance, -1.0 size