Todd's girlfriend insisted he clean the cat litter box before he went to work at the restaurant. He was late and forgot to wash his hands afterward. As soon as he entered the kitchen, the cook threw an apron at him and told him to start plating the food. Several customers came down with flu-like symptoms after their meal. Which parasite most likely infected them? Cryptosporidium parvum Trichinella spiralis Toxoplasma gondii Giardia duodenalis