Which of the following statements regarding a partnerships tax year is correct? Select one:

a. A partnership may elect to have a tax year other than the generally required tax year if the deferral period for the tax year elected does not exceed three months.

b. Within thirty days after a partnership has established a tax year, a form must be filed with the IRS as notification of a tax year adopted.

c. A "valid business purpose" can no longer be claimed as a reason for adoption of a tax year other than the generally required tax year.

d. A partnership formed on July 1 is required to adopt a tax year ending on June 30