You just traded $300$ shares at $$9\mathrm{.}98.$ what is the effective bid$-$ask spread?

Question $1$ Select one:

a$.$

$0\mathrm{.}002(=0\mathrm{.}2\%)$

b$.$

$$0\mathrm{.}04$

c$.$

$$10\mathrm{.}01$

d$.$

$$0\mathrm{.}02$

e$.$

$0\mathrm{.}004(=0\mathrm{.}4\%)$