Which may naturally result in shortages that lead to rationing?

boycott

price ceiling

trade embargo

protective tariff

The one that will naturally lead to rationing is: C. Trade embargo

In trade embargo, a country will limit the amount of a certain product distribution to another country.
To combat this, it is very common to control the local distribution of that limited product until the conflict has been resolved.

Sir thomas more, venerated in the catholic church as saint thomas more, was an english lawyer, social philosopher, author, statesman, and noted renaissance humanist. he was also a councillor to henry viii, and lord high chancellor of england from october 1529 to 16 may 1532. i found this information on wikipedia

2cars an a racing track so the drivers can race