step by step explanations please, it true or false or whats right, more than one option may be true or no true at all, the QUESTION IS COMPLETE

Consider the following statements about the income-compensated demand curve (CDC) and the uncompensated demand curve (UDC): i. When economists talk about 'standard' demand curves without specifying whether they are making reference to CDCs or UDCs, they are typically referring to UDCs. ii. For a normal good, the CDC is steeper than the UDC. iii. The magnitude of the difference in slope between the CDC and UDC depends on the magnitude of the substitution effect. iv. The magnitude of the difference in slope between the CDC and UDC depends on the magnitude of the income effect