Which of the following statements is true?

a. In general, U.S. banks are permitted to engage in a wider range of business activities in the U.S. than in foreign countries.

b. In general, U.S. banks are permitted to engage in a wider range of business activities in foreign countries than in the U.S.

c. In general, U.S. banks are permitted to engage in a wider range of business activities in the U.S. than foreign banks.

d. In general, foreign banks are permitted to engage in a wider range of business activities in the U.S. than in their home countries.

e. Both a and d are true statements.