What is quality control and hw can you descride it

Quality control is the an operational method that implementes a series of tests to ensure that the end product delivered is of good quality.

There are different types of testing techniques that are implemented based on the kind of product.

since it is asking for her reaction to elnora's trouble at school you can rule out any answers with a positive response (b). then you can rule out (d), this is because it does not show the mother's reaction but the daughter's response. that leaves you with two options (a) and (c), by looking at the options you can rule out (c) because it isn't referring back to elnora's issues at school.