Under the investment advisers act of 1940, which of the following statements are true regarding advisory contracts?

i advisory fees cannot be based upon capital gains in the account
ii advisory fees for clients with at least $1,000,000 of assets under management; or $2,000,000 net worth; can have a fee that is partly based upon capital gains
iii advisory contracts must be filed with the sec if they allow for $1,200 or more of prepaid advisory fees, 6 or more months in advance of services rendered
iv advisory contracts cannot contain provisions that violate federal law

a. i and ii only
b. iii and iv only
c. i, ii and iv
d. i, ii, iii, iv