What makes the following sentence a weak argument?

ear buds are probably doing serious physical damage to their inner eardrums or even the brain itself, but apparently that doesn’t bother anyone.

a) the author is not a medical doctor.
b) the sentence is not a weak argument.
c) the author is too angry to be persuasive.
d) the author is speculating, but not providing concrete evidence.

D. The author is speculating. It is not speculation if the author put some facts and their reliable references to the answer. And the author should not use the word “probably”, which makes the argumen sound even more like a speculation.

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.

the third one.

hope it