A second-grade teacher develops a series of lessons with the objective of teaching students how to identify syllable types as a strategy for decoding multisyllabic words. In one of the lessons, the teacher focuses on introducing the open syllable rule to support students' learning. Which of the following sets of words is best for the teacher to use in demonstrating the principle to students?

These words do not demonstrate the open syllable rule effectively. For instance, "perform" has a closed syllable ("form"), "mirror" contains a closed syllable ("mir"), and "further" also has a closed syllable structure. As such, these words do not provide the necessary examples for teaching open syllables.

Similar to option A, these words feature closed syllables. "Basket" ends in a closed syllable ("ket"), "dinner" has a closed syllable ("nner"), and "thunder" also follows this pattern. Therefore, they do not serve as appropriate examples for illustrating open syllables to second-grade students.

While "cycle" contains an open syllable ("cy"), the other two words do not. "Puzzle" has a closed syllable ("zle") and "whistle" also features closed syllables. This inconsistency means that this set of words is not ideal for demonstrating the open syllable rule comprehensively.