Which of the following was an effect of the Marshall Plan that led to a more unified Western Europe?

a. European industries struggled.

b. Trade expanded between a number of nations.

c. Unemployment rates increased across the board.

d. The Soviet Union eventually took part in the plan.

a. European industries struggled. - no, this was not the effect, but a reason for it.

b. Trade expanded between a number of nations. - yes, it did. It strengthened the industries in the countries, which lead to a better trade.

c. Unemployment rates increased across the board - no, rather decreased

d. The Soviet Union eventually took part in the plan. - no, they never did.