According to the text, how did Best Buy's employees perform in predicting gift card sales?

a$.$

The employees' predictions were off by $7$ percent.

b$.$

The employees' predictions were $1$ percent off the actual sales figures.

c$.$

The employees' predictions were $5$ percent off the actual sales figures.

d$.$

The employees' predictions were less accurate than those of experts.

e$.$

The employees' predictions were off by $99\mathrm{.}5$ percent.