Question

if the short - term inventory of the latest iphone is limited, and demand for it is very high, then:
if the price the phone is fixed at official dealers/stores, there will be excess demand (shortage)
all of these
those people who are willing to wait in line for the official price are implicitly paying a much higher - than - official price with their time
if the price is allowed to adjust in the secondary (resale) market, those sellers will be able to charge higher prices

Explanation:

When inventory is limited and demand is high, if the price is fixed at official stores, more consumers will want to buy than can be supplied, creating excess demand. People waiting in line for the official - price are expending time, which has an opportunity cost, effectively paying more. In the secondary market, with high demand and limited supply, sellers can charge higher prices. So all the statements are correct.

Answer:

B. All of these