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What is the rhyme scheme in this excerpt from Longfellow's, "The Tide Rises, the Tide Falls?"

The tide rises, the tide falls,
The twilight darkens, the curlew calls;
Along the sea-sands damp and brown
The traveler hastens toward the town,
And the tide rises, the tide falls.
A)aabba
b)ababa
c)abaca
d)abcca