Zero in (on something/someone)

Do you know the English expression “to zero in (on something/someone)“? Read the conversation below. Can you guess the meaning?

Mike: Did you talk to your teacher about your essay?

Jane: Yes. She was really negative about it. She zeroed in on my mistakes.

Does it mean:

a) give someone/something a score of zero

b) focus all one’s attention on something/someone

c) talk negatively

d) praise someone

The answer is below!↓

person holding blue ballpoint pen writing in notebook

Photo by picjumbo.com on Pexels.com

 

Answer: b) focus all one’s attention on something/someone