Kindly answer both questions

Question 2 4 pts A researcher is looking to observe available products and teenage spending habits at the canteen in observation of child obesity. Although standing consent has been provided by all parents at the beginning of the year, the researcher sends out in the mail a letter detailing the study and an opportunity for the parents to opt their child out of the study. The researcher does not receive any opt-out requests from the parents, thus the study commences. A few days into the study, a disgruntled parent who does not agree with their child being observed in the study accosts the researcher. The parent admits to receiving the opt-out letter but argues that their consent should have been sought prior to the commencement of the study. Is the parent in the right to be angry regarding prior consent? Yes or No (2 points) Why or why not? (2 points)