Nonresidents of Maryland are still subject to tax of which of the following sources of income?

All gambling winnings regardless of the source.

All nonresident sources of income are taxed by Maryland if the individual spent more than $30$ days in the state during the taxable year.

Any income derived from a business, trade, profession or occupation carried on in the state of Maryland.

The portion of federal adjusted gross income that is derived from tangible real or personal property temporarily located in Maryland.