Aplant's photoperiod is the amount of time each day that the plant receives sunlight. a plant with a 12l: 12d photoperiod receives 12 hours of light and 12 hours of dark per day. a researcher investigated whether photoperiod affects the development of flower buds in chrysanthemums, a type of flowering plant. she maintained three samples of chrysanthemums that did not initially have any flower buds under different photoperiods. after two weeks, the researcher recorded the presence or absence of flower buds in each sample. the researcher's results are shown in the table. sample photoperiod results 1 13l: 11d fully developed flower buds formed on all plants 2 14l: 10d partly developed flower buds formed on some plants 3 15l: 9d no buds formed on any plant which statement is best supported by the researcher's findings?