For 2017, Thomas, a single parent, reported the following amounts relating to his investments:

Net investment income....................................................................................................$7,000

Interest expense on a loan to purchase stocks.................................................................2,000

Interest expense on funds borrowed in 2017 to purchase land for investment.................6,000

What is the maximum amount that Thomas can deduct in 2017 as investment interest expense?

a. $1,000

b. $2,000

c. $6,000

d. $7,000