Which of the following condition must be met before an expenditure can be considered an allowable trade or business tax deduction, or which types of expenses are considered an allowable trade or business tax deduction in the tax year? Check all that apply. Select one or more:

a. Expenses related to carrying on trade or business activity

b. Expenses that are ordinary

c. Expenses that are necessary

d. Expenses that are reasonable in amount

e. Expenses that are paid or incurred during the taxable year

f. Expenses that do not frustrate public policy

g. Cost of purchase of equipment placed in a foreign country for use in trade or business

h. Expenses related to the lobbying government officials

i. Expenses of political contributions

j. Expenses related to tax-exempt income

k. Corporate business expense paid by its shareholder

l. Cost of a warehouse purchased during the year

m. Expenses related to an activity with no profit motive

n. Insurance premium paid to insure key officers with the business as the beneficiary

o. Interest expenses from a loan borrowed to purchase municipal bonds