Which image from john keats's "to autumn" best captures the bountiful nature of the season?

a.
"sometimes whoever seeks abroad may find / thee sitting careless on a granary floor"

b.
"where are the songs of spring? ay, where are they? / think not of them, thou hast thy music too"

c.
"the red-breast whistles from a garden-croft; / and gathering swallows twitter in the sky"

d.
"to bend with apples the moss'd cottage-trees, / and fill all fruit with ripeness to the core"