When you enter a congested roadway: a. you are the only driver that is experiencing a negative externality from the heavy traffic
b. the opportunity cost of idling in slow tramic is the only additional cost
c. the increased use of gasoline is the only external cost incurred
d. there are mutual external costs from the slow trafic that include increased gasoline costs and more time spent on the roadway

I would say it is D

Explanation:

one person isn't the only fixation the world doesn't revolve around yourself so i would say that everyone causes external costs that is in the congested roadway

hope I helped ❤

hi : ) i found this so i hope this !

"we first find value of tax in dollars.

the difference between the two prices   is: 23. 54 - 22 = 1.54

therefore the sales tax in dollars is 1.54

the tax % will be   (amount of tax / original cost price ) × 100

(1.54 / 22) × 100  → (0.07) × 100 =   7

so the tax rate is 7%

we can double check the answer.

7 % of 22   → (7/100) × 22 → 0.07 × 22 = 1.54

22 + 1.54 = 23.54"