Which of the Following Best Describes the Effect of the Trigger

Which of the following best describes the effect of the Trigger Price Mechanisms (TPM) on the U.S.steel industry?

A) The TPM virtually eradicated foreign competition.
B) It gave the U.S. industry a decided international competitive edge.
C) Although sales of imported steel continued to rise, the TPM gave the U.S. industry a chance to adjust.
D) As a result of the TPM, U.S. steel producers could no longer compete successfully against European markets.
E) It ensured that U.S. steel firms could count on a fixed share of the U.S. steel market.