Hi I need help answering this question can you walk me through?

Perdo owns a 50% interest in a limited partnership that operates an apartment complex. During the current year the partnership generates a taxable rental loss of $42,000. Pedro's other sources of income are salary of $55,000 and interest of $18,000. What is Pedro's allowable loss from the apartment?

a.) 0

b.) 18,000

c.) 21,000

d.) 25,000

e.) none of the above