nder current law, money that you or your employer spend on your health insurance isn't included in your income tax. Robert is an economist at a think tank who has developed a theory: if those insurance contributions WERE taxed, people would shop around more for insurance and insurance costs would fall. To test his theory, which approach is Robert likely to use

d. Look for a time in the past when taxes on insurance changed (while little else changed), and observe how choices changed before and after.

Explanation:

It is a very well known fact that economists do not agree on a lot of issues due to the different classes they follow. Should other economics review Robert's work, they would find logical inconsistencies regardless so option A is not the best approach.

Options B and C are not that much better because they would require a lot of resources and would be very hard to implement as well. Not to mention option C would be skipping the testing stage entirely.

Best option would be D. If Robert is so opportune to find a time in the past where insurance contributions were taxed then he would be able to observe how choices changed before and after. This is practical and would be the best approach.

steering wheels are always situated on the left side of the car.

always drive on the right side of the road.

white lines separate lanes of traffic traveling the same direction.

hashed or broken lines means you may change lanes when it is safe.

solid white lines mean stay in your lane.

yellow lines separate traffic moving in opposing directions.

hashed or broken yellow lines mean you can carefully pass, paying attention to oncoming traffic.

never cross a solid yellow line (or double yellow line).

when turning left at an intersection, pass in front of any cars that are turning left from the opposing direction (do not try to pass behind them).

use the left lane to pass other cars traveling your direction.

do not pass in the right lane unless absolutely necessary.

if you are driving in the far left hand lane and someone would like to pass you, move over to the right lane when it is safe to do so and allow them to pass.

you must always yield to pedestrians.

come to a complete stop whenever you see pedestrians trying to cross the street.

never pass a school bus if it has flashing red lights. wait until the lights have stopped.

be aware of bicyclists. often they share the road with cars and are supposed to also follow general traffic laws.

be particularly careful about driving in cities with bike lanes -- always check before turning that a bike is not coming.

it is mandatory to pull over or stop at an intersection to allow an emergency vehicle to pass you if you see one traveling with lights flashing and/or a siren running.

do not overuse your car horn. horns are used almost exclusively for emergency situations or for when you feel unsafe.

explanation: