Final answer:
Daisies are long-day plants and generally thrive with eight hours or more of sunlight per day, aligning with option C for the best growth conditions. This ample sunlight aligns with their preference for a photoperiod that promotes flowering.
Step-by-step explanation:
The amount of sunlight that makes a daisy grow best can be answered by understanding the photoperiodism of plants, which refers to their response to the lengths of day and night. Daisies are generally considered long-day plants, which require a period of darkness that is shorter than their critical length, often ranging between eight to fifteen hours of darkness. Theoretically, based on the information provided, this means they would thrive with more hours of sunlight per day.
Given the choices A) Six hours or more per day B) Four to six hours per day C) Eight hours or more per day D) Less than four hours per day, the best amount of sunlight for daisies, which are long-day plants, would likely be option C) Eight hours or more per day of sunlight, as this would generally provide a shorter period of darkness than their critical length, promoting flowering. This aligns with the general preference of daisies for ample sunlight to perform optimally.