"In the opinion of" is correct, but it would have to be followed by a noun, most commonly a person's name.
"In the opinion of" is more commonly used in formal writing to introduce someone's viewpoint. "By the opinion of" is less common and may sound awkward to native English speakers.
The correct punctuation for "The holidays, in my opinion, are depressing."
"Everybody has their opinion" is now commonly used as a gender-neutral alternative to "everybody has his or her opinion."
Yes, it is correct to say "you are correct." It acknowledges that the other person's statement or opinion is accurate.
No. If you are trying to say that you have the same opinion as another person, the correct way to say it is "I agree with you."
The correct spelling is "unanimous." It means fully in agreement or characterized by complete unity of opinion.
An opinion that is absolutely correct.
The correct punctuation for "The holidays, in my opinion, are depressing."
Yes, those are correct spellings of advice and opinion.
That is the correct spelling of "opinion" (a belief or view).
"Everybody has their opinion" is now commonly used as a gender-neutral alternative to "everybody has his or her opinion."
There is no correct answer. This is an opinion.
Yes, this is the correct way to use the word soliciting.
A fact most of the time is 100% correct and a opinion you can argue
Yes, it is correct to say "you are correct." It acknowledges that the other person's statement or opinion is accurate.
yes it is correct
Yes.
There is no sentence in the question on which to base an opinion.