to find out which ingredient the cockroaches are refusing, you can carry out a controlled experiment. hydramethylnon is dissolved in oleic acid before being mixed with corn syrup to prepare the poisoned bait, so you should test all three ingredients. suppose you conducted a feeding trial to test each ingredient. in the trial, a set of four agar dishes, three containing all except one ingredient and one with all three ingredients (the control), were weighed and placed 3 cm apart on the kitchen floor in an infested apartment. after two days, the dishes were weighed again to measure food consumption. you then repeated the trial 4 times and averaged the results. the setup of the feeding experiment. there are four mixtures at a distance 3 centimeters from each other. the mixture of hydramethylnon, oleic acid, and corn syrup is in the center, three other are located around. the second is a mixture of hydramethylnon and oleic acid; the third is a mixture of oleic acid and corn syrup, and the fourth is a mixture of hydramethylnon and corn syrup. here are the results from your experiment. tested (absent) diet component average food consumed (mg/day) hydramethylnon 16 oleic acid 12 corn syrup 71 control (all three ingredients present) 15 adapted from silverman and bieman. 1993. glucose aversion in the german cockroach, blattella germanica, journal of insect physiology 39: 925-933. based on the results of the feeding experiment, what conclusions can you draw? select all that apply. (for help interpreting the results, see the hints.) roaches ate about the same amount from the dish with no hydramethylnon as they did from the control dish. roaches ate about the same amount from the dish with no oleic acid as they did from the control dish. roaches ate about the same amount from the dish with no corn syrup as they did from the control dish. roaches are refusing hydramethylnon. roaches are refusing oleic acid.