If the marginal external cost of building a children's playground equals zero, then the marginal i. private cost equals the marginal social cost ii....

If the marginal external cost of building a children's playground equals zero, then the marginali. private cost equals the marginal social costii. social cost equals zeroiii. private cost equals zeroa. iii onlyb. ii only c. i and iid. ii and iiie. i only

Question:If the marginal external cost of building a children's playground equals zero, then the marginali. private cost equals the marginal social costii. social cost equals zeroiii. private...