Final answer:
Fred taking three bites of his sandwich is both observable and measurable, while statements about hunger are subjective. The statement about animals stretching their necks to grow longer is an interpretation needing evidence. Ogden's consumption choice reflects economic behavior.
Step-by-step explanation:
The statement that is both observable and measurable is A. Fred took three bites of his sandwich. This statement is an observation because it describes a direct, visible action that could be counted or quantified. Statements B and C, concerning Julie and Og being hungry, involve subjective feelings and cannot be measured directly.
For the second question, C. Animals which constantly stretch their necks will grow longer necks is the interpretation, rather than an observation. This statement makes a speculative claim about causality which would require empirical evidence to support.
Regarding the scenario about Ogden's consumption choices, it clearly demonstrates how a change incost influences consumer behavior, which is an important concept in economics.