Please help me and answer all questions

11. Under P.L. 86-272, which of the following transactions creates nexus

a. Conducting training classes, seminars, or lectures for persons other than sales personnel.

b. Passing inquiries or complaints on to the home office

c. Maintaining a sample or display room for two weeks or less during the year

d. Maintaining a website that presents information about items of tangible personal property that are for sale.

12. To determine whether an out-of-state entity has income tax nexus, some states use:

a. A factor-presence test.

b. An economic presence test.

c. Both a. and b are used by certain states.

d. Neither a. nor b is used by the states.

13. Which circumstance does not create sufficient nexus:

a. Deriving income within the state

b. Owning property or leased within the state

c. Carrying free samples only for display or distribution

d. Employing persons within the state.

14. Which circumstances creates sufficient nexus?

a. Making repairs or providing maintenance

b. Advertising campaigns

c. Maintaining a sample or display room for two weeks or less during the year

d. Maintaining a website that presents information about items of tangible personal property that are for sale