Passage Summary: If you bury pigweed seeds in the dirt all winter and then plow the field in the spring, the quick flash of sunlight they get while being moved around will make them sprout.

Reasoning: Pigweed seeds buried all winter become highly sensitive to light; plowing churns them to the surface where brief sunlight exposure triggers germination; both prolonged darkness and light exposure are necessary for this process.

Analysis: Since this is a 'Most Strongly Supported' question, we must treat the stimulus as a set of rules and see what logically follows. The text establishes a specific biological trigger: seeds need a long 'nap' in the dark followed by a 'wake-up call' of sunlight. If a field is plowed in the spring after a winter burial, those seeds have met both conditions. Look for an answer choice that confirms these seeds are now primed to sprout, or conversely, that seeds lacking one of these steps (like those plowed at night) likely won't.