Answer:
The correct answer is - had a cow.
Explanation:
The phrase that would be used in the given blank of the statement is "had a cow" which means reacting strongly and emotionally. It is explained as being very upset, worried, or angry about something.
In this case, the parents of the student are very upset due to his poor grades and being embarrassed by calling by the teacher. Therefore the best phrase that should be used here would be - had a cow.
