What current in a solenoid

$15\mathrm{.}0$cm

long wound with $100$ turns would produce a magnetic field equal to that of the Earth,

$5\mathrm{.}00\backslash$times $10$

$5$

T

$?$ A$)$

$0\mathrm{.}0596$

$$ B$)$

$0\mathrm{.}421$ A

C$)$

$2\mathrm{.}65$ A

D$)$

$3\mathrm{.}00$ A