All the following industry practices are considered unethical by industry regulators except $....$

Question $30$ options:

Using high$-$pressure or otherwise undesirable selling techniques

An investment advisor trading in her own account after completing the same trade on behalf of a client

Making an untrue trade that involved no change to the beneficial ownership of securities

Entering, or trying to enter, into any arrangement to sell and repurchase a security to manipulate a financial market