Question

below the claim and the two pieces of evidence.
watching a horror movie is an effective way to cope with anxiety.
evidence a: on an online forum for people with anxiety, one user advises her friends to watch scary movies, the rush of energy they give you can make you forget about your anxiety for a while, she writes.
evidence b: a researcher at a danish university says that watching horror movies allows people with anxiety to voluntarily - and under controlled circumstances - get experience with negative emotion, he explains that it can be helpful to experience manageable anxiety about something that isnt real.
why is evidence b stronger than evidence a?
evidence a does not directly support the claim, it does not discuss whether watching scary movies can help with anxiety.
evidence a does not come from a credible source. it is based on the opinion of a person who is not an expert.

Explanation:

Evidence B comes from a researcher at a university, a credible expert - source. Evidence A is from an individual on an online forum, not an expert. Expert - sourced evidence is generally stronger.

Answer:

Evidence A does not come from a credible source. It is based on the opinion of a person who is not an expert.