In Which Situation Would a Privacy Impact Assessment (PIA) Be

In which situation would a Privacy Impact Assessment (PIA) be the least likely to be required?

A) If a company created a credit-scoring platform five years ago.
B) If a health-care professional or lawyer processed personal data from a patient's file.
C) If a social media company created a new product compiling personal data to generate user profiles.
D) If an after-school club processed children's data to determine which children might have food allergies.