Final answer:
The best answer choice that identifies an observable and measurable instructional objective for a unit of study on Hispanic cultures is B. Students will learn the significance of a mother's surname to an individual's full name in Hispanic cultures.
Step-by-step explanation:
The best answer choice that identifies an observable and measurable instructional objective for a unit of study on Hispanic cultures is B. Students will learn the significance of a mother's surname to an individual's full name in Hispanic cultures.
This objective focuses on a specific aspect of Hispanic cultures, namely the naming customs, and it is observable and measurable because students can demonstrate their knowledge and understanding of this concept through written or verbal explanations.