The statement that BEST defines a dactylic hexameter or heroic hexameter is option d: Six meters containing approximately 18 syllables: six long syllables, each followed by two short syllables.
Dactylic hexameter was said to be used in ancient Greek and Latin epic poetry, features six metrical feet, totaling approximately 18 syllables. Each foot consists of a long syllable followed by two short ones, creating a rhythmic pattern.
So, This structure was also known to imparts a distinctive cadence to the verse, allowing for expressive and memorable storytelling. The choice of six feet establishes the hexameter, and the alternating long and short syllables contribute to the meter's musical and majestic quality.