Explain why the divisibility rule for 4 works.

Ibelieve the answer is c i worked it out three times but if my answer is wrong someone correct me

$250 deductible means jane must pay the first $250 of her bill. so the insurance company paid = (80% of bill) - deductible = (0.8 x $2550) - $250 = $2040 - $250 = $1790 and jane's cost is = (bill) - (insurance payment) = $2550 - $1790 = $760

Wish i could u but i just don’t know the answer