The correct answer is B. Schools should move away from standardized testing because tests often do more harm than good.
Step-by-step explanation:
A claim is a statement used to express one's position towards an issue and that is used in essays or speeches with persuasive purposes. Additionally, a claim is considered as narrow and focused when it addresses only one specific point in a broader topic and this is clearly stated rather than including multiple points or including concepts that are not related. Considering this, the claim that is the narrowest and most focused is "Schools should move away from standardized testing because tests often do more harm than good" because this claim is specific as it addresses "standardized testing" and also provides one specific and clear reason for this that is "do more harm than good". Also, other options address more than one point or include concepts that are not related to the point addresses and therefore are broad and are not focused.