Which of the following statements is/are true?

Group of answer choices

A. In Geoffrey, the U.S. Supreme Court said that it is well-settled that a taxpayer need not have a tangible, physical presence in a state for income to be taxable in that state.

B. In Geoffrey, the Supreme Court of South Carolina said that it is well-settled that a taxpayer need not have a tangible, physical presence in a state for income to be taxable in that state.

C. In Geoffrey, the Supreme Court of South Dakota said that it is well-settled that a taxpayer need not have a tangible, physical presence in a state for income to be taxable in that state.

D. It was well-settled, when Geoffrey was decided, that a taxpayer need not have a tangible, physical presence in a state for income to be taxable in that state.

E. Both A and B are true