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B. Yellow rocket
Sorry, that is incorrect. The weed pictured is common groundsel (Senecio vulgaris) — a winter or summer annual in most parts of the country, a biennial in coastal areas. This broadleaf weed prefers cool, rich, moist soils and reproduces by seed. Each plant may produce three to four generations of seeds in one season.
Common groundsel features a single stem or branched upright growth, 6 to 18 inches tall, and its yellow flowers bloom nearly year round. Leaves are highly variable, from hairless to lightly covered with long wavy or cotton-like hairs.
Because the seed is easily spread and can potentially deposit numerous seeds throughout the season, the best option for control is an early season application of a preemergence herbicide such as Gallery® specialty herbicide. It is the only selective preemergence herbicide that prevents the growth of broadleaf weeds for up to eight months. It is labeled for use on all established cool- and warm-season turfgrasses. To prevent common groundsel infestation, use good sanitation practices supplemented with preemergence herbicides.