Scientific theories are subject to change. select the best answer from the choices provided t f

Theory as per the dictionary definition:

A supposition or a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained

The keyword here is supposition, even by definition itself a theory is mutable and thus subject to change.

The answer is TRUE Scientific theories are subject to change.

the correct answer is modern american cars are not available due to trade restrictions.

trade between cuba and the united states have serious restrictions. the u.s. imposed an economic embargo on cuba, that among other things means that modern american cars are not available due to trade restrictions.

in response to some governmental actions of the authorities from cuba, president john f. kennedy proclaimed an embargo on trade between both countries in february 1962. the trade embargo remains active until this day and was implemented directly by the departments of commerce and the department of treasury.

in president trump’s administration, there is a national security presidential memorandum that "strengthens the policy of the u. s.", affecting trade with cuba.

that is alot i do not no