Which One of the Following Could NOT Theoretically Be Offered

Which one of the following could NOT theoretically be offered to help in explaining the "Leontief paradox?"

A) a relatively strong U.S. demand for relatively labor-intensive goods
B) relatively high U.S. tariffs on relatively labor-intensive imports
C) U.S. importation of goods that are relatively natural resource-intensive in their
Production processes
D) a relatively strong U.S. demand for relatively capital-intensive goods and/or a
Relatively strong foreign demand for relatively labor-intensive goods