Final answer:
Without additional context or information, it is impossible to accurately determine the expression for the amount of lemonade Ian poured in terms of p. Each option provided represents a different mathematical relationship to p.
Step-by-step explanation:
The question asks to write an expression in terms of p to represent the amount of lemonade (in ounces) Ian poured in his glass. To create the expression, we need more context or information that specifies the relationship between p and the ounces of lemonade. Since the problem doesn't provide any additional details or relations, it isn't possible to determine which of the given options A, B, C, or D is correct without further information. Each option represents a different mathematical relation to p:
2p - Implies Ian poured double the amount represented by p.p - 2 - Implies Ian poured an amount that is two less than p.2 + p - Implies Ian poured an amount that is two more than p.p/2 - Implies Ian poured half the amount represented by p.