Javier's little sister tends to bother him while he is doing homework. Javier wants to figure out which toy will keep his sister occupied the longest, so he will not be bothered.Javier decides to...

Javier's little sister tends to bother him while he is doing homework. Javier wants to figure out which toy will keep his sister occupied the longest, so he will not be bothered. Javier decides to conduct an experiment where each day at 6 PM for a week he gives his sister a different toy, and on one of the days, he gives her no toys to play with. Javier measures the amount of time his sister spends playing with each toy before she comes to bother him. Which of the following is a confounding variable in this example? Amount of time spent playing with the toy Javier Little sister's mood Time of day Toy being offered