Which of the following statements is true regarding the deductibility of investment interest expense? Deductible in full subject to the 2% of AGI floor that applies to miscellaneous itemized deductions Deductible only to the extent of net investment income; any excess amounts can be carried forward indefinitely Deductible only to the extent of net investment income, excess amounts cannot be carried forward and thus are non-deductible CA OB Deductible only to the extent of the interest on a principal amount that does not exceed $1,000,000 90